docs(parser): create install section

Author: heitorlessa

docs/utilities/parser.md

@@ -12,22 +12,21 @@ This utility provides data parsing and deep validation using [Pydantic](https://
 * Built-in envelopes to unwrap, extend, and validate popular event sources payloads
 * Enforces type hints at runtime with user-friendly errors
 
-**Extra dependency**
+## Getting started
 
-???+ warning
+### Install
 
+!!! info "This is not necessary if you're using Lambda Layer"
+
+Add `aws-lambda-powertools[parser]` in your preferred dependency management tool.
+
+???+ warning
     This will increase the compressed package size by >10MB due to the Pydantic dependency.
 
     To reduce the impact on the package size at the expense of 30%-50% of its performance [Pydantic can also be
     installed without binary files](https://pydantic-docs.helpmanual.io/install/#performance-vs-package-size-trade-off):
 
-    `SKIP_CYTHON=1 pip install --no-binary pydantic aws-lambda-powertools[pydantic]`
-
-Install parser's extra dependencies using **`pip install aws-lambda-powertools[pydantic]`**.
-
-## Getting started
-
-### Install
+	Pip example: `SKIP_CYTHON=1 pip install --no-binary pydantic aws-lambda-powertools[parser]`
 
 ### Defining models