installation: update to use hatch following change in backend and other frontends: - `setup.py` and `requirements.txt` have been removed in favor of `pyproject.toml` - changed versionning mechanism to use a version directly in `libervia/desktop_kivy/__init__.py` handled by Hatch - remove the log hack from `kivy_hack` as there is now an environment variable to disable the logging hijacking

This directory contains files related to Libervia Desktop but not directly used by it.

* org.libervia.LiberviaDesktop.metainfo.xml:
	AppStream metadata as specified at https://www.freedesktop.org/software/appstream/docs/

* org.libervia.LiberviaDesktop.desktop:
	Desktop entry as specified at https://specifications.freedesktop.org/desktop-entry-spec/