Add some examples

[Mx-Iris]

Hey buddy, thanks to your framework for making it easier for me to write macro code, I've now added some macros I'm using as examples, and I've changed the version control tag exact to from to be compatible with newer versions of swift-syntax

[stackotter]

Thanks for the PR, I'm glad that you're finding the library useful! Changing the tag from exact to from is definitely a good idea now that Swift Syntax is stabilising.

In regards to the new example macros, I think these are great use-cases, however the macros are all very similar so they don't individually provide too much use as separate examples. I think the AddAsyncInterface and AddAsyncImplementation macros should be able to be merged into a single macro, and the AllMembers versions should be able to be merged into a single macro too. Happy to give more pointers on condensing the macros if needed!

[Mx-Iris]

@stackotter Yes, I just need to check whether the function definition contains the body to distinguish between interface and implementation. I have changed it according to what you said

[stackotter]

Awesome thanks! Love how simple the AllMembers version is now 👌