Gamepadla-plus

Changed

* Reworked some parts of the readme and `pyproject.toml`.

Added

* Added Icon

Added

* Added popup and cli command for showing third party licenses.

Changed

* Gui is started with `gamepadla` command without any subcommands.
* Removed the explicit gui command.

Fixed crash when clicking on the empty controller list.

Fixed

* Crash when calling `gamepadla license` and gui equivalent.

Added

* GUI