Documentation (parameters): add utility examples

[dreamorosi]

Description of the improvement

Summary of the proposal The repository contains - at present - examples in CDK and SAM that showcase how to use the Powertools utilities available. The new parameters utility should be part of these example.

How, where did you look for information In the CDK & SAM examples.

Missing or unclear documentation N/A

Improvement Include examples of the new utility.

Related existing documentation

https://github.com/awslabs/aws-lambda-powertools-typescript/tree/main/examples

Related issues, RFCs

#846