Interop with FastAPI

[strangemonad]

Thanks for this awesome project!

I know the main goal is actually to provide a stand-alone alternative but I'm curious if there's a way (or plans) to support interoperability with the FastAPI dependency system.

The main use case I can think of is the following:

• In a larger code base, I want to be able to create some libraries that can be re-used in different contexts. E.g. a db package with connection pool setup dependencies. Sometimes that might be included in a fastapi app, other times a fast-stream app, other times a cli tool. I would like to be able to share the dependency configuration.
• This is similar in spirit to how the guice or dagger dependency frameworks on the jvm allow you to create DI modules that can be composed and included (e.g. in a Spring boot or Jetty server).

[Lancetnik]

Thanks for your feedback and ideas! I really appreciate that! For now FastDepends provides you with just a regular FastAPI Depends and serialization feauture, so I didn't plan a FastAPI compatibility due it already has it's own functional.

Also, FastDepends is not a really Dependency Injection library, it just a DI-like tool. But I had a lot of feedback and ideas about making FastDepends truly Dependency Injection system, so I have a big plan on it!

For now, I want to finish with FastStream reworking and improvements, then I am planning to refactor FastDepends as well to make it compatible-with-everнthing tool. But, it is not nearest future plans, sorry.

[strangemonad]

@Lancetnik I think that order or priorities makes sense