Implement $vectorSearch stage builder

Author: GromNaN

generator/config/search/queryString.yaml

@@ -32,4 +32,4 @@ tests:
             -
                 $project:
                     _id: 0
-                    title: 1
+                    title: 1

generator/config/search/wildcard.yaml

@@ -57,4 +57,4 @@ tests:
             -
                 $project:
                     _id: 0
-                    title: 1
+                    title: 1

generator/config/stage/vectorSearch.yaml

@@ -0,0 +1,115 @@
+# $schema: ../schema.json
+name: $vectorSearch
+link: 'https://www.mongodb.com/docs/atlas/atlas-vector-search/vector-search-stage/'
+type:
+    - stage
+encode: object
+description: |
+    The $vectorSearch stage performs an ANN or ENN search on a vector in the specified field.
+arguments:
+    -
+        name: index
+        type:
+            - string
+    -
+        name: limit
+        type:
+            - int
+    -
+        name: path
+        type:
+            - searchPath
+    -
+        name: queryVector
+        type:
+            - array # of numbers
+    -
+        name: exact
+        optional: true
+        type:
+            - bool
+    -
+        name: filter
+        optional: true
+        type:
+            - query
+    -
+        name: numCandidates
+        optional: true
+        type:
+            - int
+tests:
+    -
+        name: 'ANN Basic'
+        link: 'https://www.mongodb.com/docs/atlas/atlas-vector-search/vector-search-stage/#ann-examples'
+        pipeline:
+            -
+                $vectorSearch:
+                    index: 'vector_index'
+                    path: 'plot_embedding'
+                    queryVector:
+                        - -0.0016261312
+                        - -0.028070757
+                        - -0.011342932
+                        # skip other numbers, not relevant to the test
+                    numCandidates: 150
+                    limit: 10
+            -
+                $project:
+                    _id: 0
+                    plot: 1
+                    title: 1
+                    score:
+                        $meta: 'vectorSearchScore'
+
+    -
+        name: 'ANN Filter'
+        link: 'https://www.mongodb.com/docs/atlas/atlas-vector-search/vector-search-stage/#ann-examples'
+        pipeline:
+            -
+                $vectorSearch:
+                    index: 'vector_index'
+                    path: 'plot_embedding'
+                    filter:
+                        $and:
+                            -
+                                year:
+                                    $lt: 1975
+                    queryVector:
+                        - 0.02421053
+                        - -0.022372592
+                        - -0.006231137
+                        # skip other numbers, not relevant to the test
+                    numCandidates: 150
+                    limit: 10
+            -
+                $project:
+                    _id: 0
+                    title: 1
+                    plot: 1
+                    year: 1
+                    score:
+                        $meta: 'vectorSearchScore'
+
+    -
+        name: 'ENN'
+        link: 'https://www.mongodb.com/docs/atlas/atlas-vector-search/vector-search-stage/#enn-examples'
+        pipeline:
+            -
+                $vectorSearch:
+                    index: 'vector_index'
+                    path: 'plot_embedding'
+                    queryVector:
+                        - -0.006954097
+                        - -0.009932499
+                        - -0.001311474
+                        # skip other numbers, not relevant to the test
+                    exact: true
+                    limit: 10
+            -
+                $project:
+                    _id: 0
+                    plot: 1
+                    title: 1
+                    score:
+                        $meta: 'vectorSearchScore'