Picodi

- Clear store for singleton scope on `shutdown_resource`

- Fix "coroutine was never awaited" warning when closing context manager for sync function in async context

- Added `registry` object for managing dependencies
- Now you can override dependencies. Useful for testing and "ABC" dependencies
- Removed `make_dependency` experimental function
- Some code cleanups
- Fixed tests inconsistency (cleanup picodi resources after each test)

- Add `helpers` module
- Fix potential `RuntimeWarning`

- Switch from storing only resource deps to storing all deps
- Don't initialize unused resources
- Refactor scope resource management
- Removed dead code (detecting fastapi dependency)

- Fix resource placement bug
- Change typings for `init_resources` and `shutdown_resources`. Now they always return `Awaitable`.
- Add tests for FastAPI integration