build: Migrate to hatchling for packaging

[matthewfeickert]

* Change from setuptools to hatchling for packaging and package
  distribution building.
   - Move all packaging information into pyproject.toml.
   - Use vcs information to determine version information.
   - Ignore the vcs generated _version.py file.
   - Remove setup.cfg and VERSION files.
* Switching to getting version information from importlib.metadata.version
  in the docs.
* Clone the full repository history as needed in CI to get all tag information.