SnippetsFilter CRD missing from crds manifest (nginx#2821)

Problem: The SnippetsFilter CRD is missing from deploy/crds.yaml, 
which is used to install NGF with manifests. 

Solution: Add SnippetsFilter CRD to the kustomization file that is
used to generate the deploy/crds.yaml file.

Author: miledxz

config/crd/kustomization.yaml

@@ -5,3 +5,4 @@ resources:
   - bases/gateway.nginx.org_nginxgateways.yaml
   - bases/gateway.nginx.org_nginxproxies.yaml
   - bases/gateway.nginx.org_observabilitypolicies.yaml
+  - bases/gateway.nginx.org_snippetsfilters.yaml

deploy/crds.yaml

@@ -1293,3 +1293,192 @@ spec:
     storage: true
     subresources:
       status: {}
+---
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  annotations:
+    controller-gen.kubebuilder.io/version: v0.16.5
+  name: snippetsfilters.gateway.nginx.org
+spec:
+  group: gateway.nginx.org
+  names:
+    categories:
+    - nginx-gateway-fabric
+    kind: SnippetsFilter
+    listKind: SnippetsFilterList
+    plural: snippetsfilters
+    shortNames:
+    - snippetsfilter
+    singular: snippetsfilter
+  scope: Namespaced
+  versions:
+  - additionalPrinterColumns:
+    - jsonPath: .metadata.creationTimestamp
+      name: Age
+      type: date
+    name: v1alpha1
+    schema:
+      openAPIV3Schema:
+        description: |-
+          SnippetsFilter is a filter that allows inserting NGINX configuration into the
+          generated NGINX config for HTTPRoute and GRPCRoute resources.
+        properties:
+          apiVersion:
+            description: |-
+              APIVersion defines the versioned schema of this representation of an object.
+              Servers should convert recognized schemas to the latest internal value, and
+              may reject unrecognized values.
+              More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
+            type: string
+          kind:
+            description: |-
+              Kind is a string value representing the REST resource this object represents.
+              Servers may infer this from the endpoint the client submits requests to.
+              Cannot be updated.
+              In CamelCase.
+              More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
+            type: string
+          metadata:
+            type: object
+          spec:
+            description: Spec defines the desired state of the SnippetsFilter.
+            properties:
+              snippets:
+                description: |-
+                  Snippets is a list of NGINX configuration snippets.
+                  There can only be one snippet per context.
+                  Allowed contexts: main, http, http.server, http.server.location.
+                items:
+                  description: Snippet represents an NGINX configuration snippet.
+                  properties:
+                    context:
+                      description: Context is the NGINX context to insert the snippet
+                        into.
+                      enum:
+                      - main
+                      - http
+                      - http.server
+                      - http.server.location
+                      type: string
+                    value:
+                      description: Value is the NGINX configuration snippet.
+                      minLength: 1
+                      type: string
+                  required:
+                  - context
+                  - value
+                  type: object
+                maxItems: 4
+                minItems: 1
+                type: array
+                x-kubernetes-validations:
+                - message: Only one snippet allowed per context
+                  rule: self.all(s1, self.exists_one(s2, s1.context == s2.context))
+            required:
+            - snippets
+            type: object
+          status:
+            description: Status defines the state of the SnippetsFilter.
+            properties:
+              controllers:
+                description: |-
+                  Controllers is a list of Gateway API controllers that processed the SnippetsFilter
+                  and the status of the SnippetsFilter with respect to each controller.
+                items:
+                  properties:
+                    conditions:
+                      description: Conditions describe the status of the SnippetsFilter.
+                      items:
+                        description: Condition contains details for one aspect of
+                          the current state of this API Resource.
+                        properties:
+                          lastTransitionTime:
+                            description: |-
+                              lastTransitionTime is the last time the condition transitioned from one status to another.
+                              This should be when the underlying condition changed.  If that is not known, then using the time when the API field changed is acceptable.
+                            format: date-time
+                            type: string
+                          message:
+                            description: |-
+                              message is a human readable message indicating details about the transition.
+                              This may be an empty string.
+                            maxLength: 32768
+                            type: string
+                          observedGeneration:
+                            description: |-
+                              observedGeneration represents the .metadata.generation that the condition was set based upon.
+                              For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date
+                              with respect to the current state of the instance.
+                            format: int64
+                            minimum: 0
+                            type: integer
+                          reason:
+                            description: |-
+                              reason contains a programmatic identifier indicating the reason for the condition's last transition.
+                              Producers of specific condition types may define expected values and meanings for this field,
+                              and whether the values are considered a guaranteed API.
+                              The value should be a CamelCase string.
+                              This field may not be empty.
+                            maxLength: 1024
+                            minLength: 1
+                            pattern: ^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$
+                            type: string
+                          status:
+                            description: status of the condition, one of True, False,
+                              Unknown.
+                            enum:
+                            - "True"
+                            - "False"
+                            - Unknown
+                            type: string
+                          type:
+                            description: type of condition in CamelCase or in foo.example.com/CamelCase.
+                            maxLength: 316
+                            pattern: ^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])$
+                            type: string
+                        required:
+                        - lastTransitionTime
+                        - message
+                        - reason
+                        - status
+                        - type
+                        type: object
+                      maxItems: 8
+                      minItems: 1
+                      type: array
+                      x-kubernetes-list-map-keys:
+                      - type
+                      x-kubernetes-list-type: map
+                    controllerName:
+                      description: |-
+                        ControllerName is a domain/path string that indicates the name of the
+                        controller that wrote this status. This corresponds with the
+                        controllerName field on GatewayClass.
+
+                        Example: "example.net/gateway-controller".
+
+                        The format of this field is DOMAIN "/" PATH, where DOMAIN and PATH are
+                        valid Kubernetes names
+                        (https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#names).
+
+                        Controllers MUST populate this field when writing status. Controllers should ensure that
+                        entries to status populated with their ControllerName are cleaned up when they are no
+                        longer necessary.
+                      maxLength: 253
+                      minLength: 1
+                      pattern: ^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*\/[A-Za-z0-9\/\-._~%!$&'()*+,;=:]+$
+                      type: string
+                  required:
+                  - controllerName
+                  type: object
+                maxItems: 16
+                type: array
+            type: object
+        required:
+        - spec
+        type: object
+    served: true
+    storage: true
+    subresources:
+      status: {}