Feature request: create `BaseRouter` with base methods

[dreamorosi]

Use case

As part of the Event Handler implementation (#3251) we should implement a base class that will be shared by all resolvers (API Gateway REST, HTTP, ALB, etc.) and that allows customers to register routes according to the RFC #3500.

Solution/User Experience

The implementation should follow the RFC in terms of DX and APIs while also being aligned with the implementation in the Powertools for AWS Lambda (Python) repo.

To avoid refactoring down the line, for now we'll implement only a few base methods (i.e. get and post) and minimal configuration options. Follow up issues will cover other methods and missing options.

Alternative solutions

N/A

Acknowledgment

• This feature request meets Powertools for AWS Lambda (TypeScript) Tenets
• Should this be considered in other Powertools for AWS Lambda languages? i.e. Python, Java, and .NET

Future readers

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