Bevy

Fixes the function provider not understanding string annotations.

This fixes the function provider not creating dependencies if they don't already exist. It also moves the `bevy_method` decorator to the `bevy.__init__.py` for easier access.

This release fixes a bug where providers didn't have their dependencies detected. It also changes the function provider to default to returning the requested function if no matching functions are found in the repo.

Add a context factory classmethod that handles creation of a context. The factory method can accept a context instance, which will be returned immediately. If no context instance is provided the factory will handle creating a context using the provided providers and parent. If no providers are given the function and type providers will be used.

Creating a context directly without providers will no longer set any default providers.

This is a complete rewrite designed to greatly simplify the implementation and rely less on magic. It no longer injects all annotated class fields, instead opting to only inject class fields with annotations that inherit from Injectable. This makes it simpler to integrate with other tools that also rely on annotated class fields. Using descriptors also greatly simplifies what needs to be done to create functionality like factories.