- updated installation to use the now standard `pyproject.toml` instead of legacy
`setup.py`. `setup.py` and other legacy files have been deleted.
- removed outdated README4PACKAGERS
- removed pylintrc which has not been correctly reviewed. Linter conf should go to
`pyproject.toml` now.
- [hatch](https://hatch.pypa.io) is now used as main building tool. However, thanks to the
use of standards, other tools can be used too.
- update .hgignore
- several dependencies version bump, with code update to adapt to changes.
pyfeed and xe where still used only for date format handling, and there is already dateutil which is a dependency of Wokkel.
Furthermore pyfeed and xe are still not on pypi, causing troubles for installation with pip
- chat: notification was raising an error when you just entered the room and self.nick is None
- quick_widget: deleting a widget was modifying a dict while looping on it + unselect widget when it's being deleted
