Feature request: improve return types for AppConfig Parameters

[dreamorosi]

Use case

Note
This is a follow up issue to #1386 and aims at continuing the work started in #1387

Currently when retrieving parameter values from AppConfig, the Parameter utility has somewhat generic return types.

Given that the utility knows both the types returned by the API and the transformation to be applied, there's an opportunity to improve the return types by applying some heuristics.

Solution/User Experience

TBD

Alternative solutions

No response

Acknowledgment

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

Future readers

Please react with 👍 and your use case to help us understand customer demand.