Pyee

- Type checking improvements
- Introduce overloads for `ee.on`
- Add `None` return type for functions as appropriate
- Type `self` as `Any` in all methods
- Local and CI tasks for type checking with `mypy`
- `mypy` type checking passes
- `pyright` type checking passes
- Addition of `mypy` to development dependencies
- Removed conditional import of `iscoroutine`
- This was implemented to support Python 3.3, which was dropped long ago
- Removed type stub for `twisted.python.Failure`
- This was to address a typing issue in unsupported versions of Twisted
- Export `Handler` type in `pyee/__init__.py`

- Fixed ReadTheDocs build
- `build.os` is [now a required parameter](https://blog.readthedocs.com/use-build-os-config/)
- `python.version` is replaced by `build.tools`

- New features in `pyee.asyncio.AsyncIOEventEmitter`:
- `wait_for_complete` method to wait for all running handlers to complete
execution
- `cancel` method to cancel execution of all running handlers
- `complete` property that's `True` when no handlers are currently running
- Updated changelog for v12 release to describe where to find alternatives
to deprecated and removed imports
- Add support for Python 3.13
- Upgrade GitHub Actions
- Upgrade `actions/setup-python` to v5
- Upgrade `actions/setup-node` to v4
- Upgrade `actions/upload-artifact` to v4
- Updated `CONTRIBUTORS.md` to include missing contributors

- Remove deprecated imports:
- `pyee.BaseEventEmitter`
- Use `pyee.base.EventEmitter` or `pyee.EventEmitter` instead
- `pyee.AsyncIOEventEmitter`
- Use `pyee.asyncio.AsyncIOEventEmitter` instead
- `pyee.TwistedEventEmitter`
- Use `pyee.twisted.TwistedEventEmitter` instead
- `pyee.ExecutorEventEmitter`
- Use `pyee.executor.ExecutorEventEmitter` instead
- `pyee.TrioEventEmitter`
- Use `pyee.trio.TrioEventEmitter` instead
- Add `PyeeError` which inherits from `PyeeException`, and use throughout
- Deprecate direct use of `PyeeException`
- Use `PyeeError` instead

- Add project URLs to pyproject.toml and PyPI
- Use ActionLint v2
- Fix GitHub release action

- Generate a man page with Sphinx (in addition to mkdocs HTML)
- Use GitHub Actions to cut releases