docs: highlight examples being readily available

Author: heitorlessa

docs/core/event_handler/api_gateway.md

@@ -13,6 +13,9 @@ Event handler for Amazon API Gateway REST and HTTP APIs, and Application Loader
 
 ## Getting started
 
+???+ tip
+    All examples shared in this documentation are available within the [project repository](https://github.com/awslabs/aws-lambda-powertools-python/tree/develop/examples){target="_blank"}.
+
 ### Required resources
 
 You must have an existing [API Gateway Proxy integration](https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-proxy-integrations.html){target="_blank"} or [ALB](https://docs.aws.amazon.com/elasticloadbalancing/latest/application/lambda-functions.html){target="_blank"} configured to invoke your Lambda function.

docs/core/logger.md

@@ -14,6 +14,9 @@ Logger provides an opinionated logger with output structured as JSON.
 
 ## Getting started
 
+???+ tip
+    All examples shared in this documentation are available within the [project repository](https://github.com/awslabs/aws-lambda-powertools-python/tree/develop/examples){target="_blank"}.
+
 Logger requires two settings:
 
 | Setting           | Description                                                         | Environment variable      | Constructor parameter |

docs/core/metrics.md

@@ -28,6 +28,9 @@ If you're new to Amazon CloudWatch, there are two terminologies you must be awar
 
 ## Getting started
 
+???+ tip
+    All examples shared in this documentation are available within the [project repository](https://github.com/awslabs/aws-lambda-powertools-python/tree/develop/examples){target="_blank"}.
+
 Metric has two global settings that will be used across all metrics emitted:
 
 | Setting              | Description                                                                     | Environment variable           | Constructor parameter |

docs/core/tracer.md

@@ -16,6 +16,9 @@ Tracer is an opinionated thin wrapper for [AWS X-Ray Python SDK](https://github.
 
 ## Getting started
 
+???+ tip
+    All examples shared in this documentation are available within the [project repository](https://github.com/awslabs/aws-lambda-powertools-python/tree/develop/examples){target="_blank"}.
+
 ### Permissions
 
 Before your use this utility, your AWS Lambda function [must have permissions](https://docs.aws.amazon.com/lambda/latest/dg/services-xray.html#services-xray-permissions) to send traces to AWS X-Ray.