Provide better "hover" debuggability in VSCode

[mcollina]

If you "hover" one of our Request or Reply objects, they are overcrowded and hard to understand, and this is an expectation for a good DX in TypeScript:

vs alternatives:

I'm not sure how we could improve this, because we allow a great degree of flexibility, but this has never been on our radar before.

[mcollina]

cc @climba03003

[climba03003]

It can be done by grouping the generic and resolved to a single type.
When we passing around it won't be a very long chain of generic.

I have tried once to compact the generic argument but no luck.
The base types is really better to type as unknown to accept any variant.

To be fair, it still provide the information of what is the expected types in the later line.