Option to enable annotations for functions that are related to conformances of protocols

[MahdiBM]

Is your feature request related to a problem? Please describe.
There should be an option so we can ask the VSCode extension to enable showing inlay hints or such, for properties that are for conformances to protocols.

So basically if a type is conforming to CustomStringConvertible, there would be annotations near the var description: String indicating this is for conformance to CustomStringConvertible.

So we have a way to easily make sure a function is related to a conformance. It can help a lot when dealing with any protocols you're not too familiar with.

I'd enable this by default too but It's fine by me either way.

Describe alternatives you've considered
The compiler and all could go for adding a keyword like override but I don't think that's necessary considering we can solve the problem at tooling level.

Additional context

[adam-fowler]

This could get quite unwieldy if you have a function with a large signature and a protocol requirement with many where clauses.

I can also see its use.

[MahdiBM]

Hmm for now I'm thinking of a basic protocol name inlay hint.
We could have different settings for these though. IIRC the rust extension has 25+ inlay hint settings.

[award999]

Would need support from the LSP swiftlang/sourcekit-lsp#2214