HTTP form data support

[JunielKatarn]

Summary

Current HTTP module implementation ignores form data to be sent as part of a request.

This is due to dropping folly APIs from IHttpResource so that the interface is forward-compatible with TurboModules.

This creates the need for conversion logic from a folly::dynamic object containing the form data to an either ABI safe or at least Standard Library-based object type.

Motivation

Form data body types are supported in both Android and Apple variants of React Native.

Basic Example

No response

Open Questions

No response

[tero-paananen]

https://github.com/microsoft/react-native-windows/issues/10378