Kaioretry

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Fixes
* Add missing sphinx-rtd-theme documentation dependencies

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New
- Add python 3.12 support

Changes
- Use changelog-cli to handle changelog and version

Fixes
- minor issue in aioretry docstring format
- Fix Context and _ContextIterator type thing

Changes
- Some minor documentation updates

New
- Introduce AioretryCoro, AwaitableFunc and AnyFunction type aliases

New
- Add mypy github action and its badge

Changes
- Update all decorators type annotations in order to allow kaioretry end-users
to type-lint their code

Fixes
- Fix previous fix -_-