[Request] Add support for listening and reconfiguring the keyboard settings from locale1 for v1

[Conan-Kudo]

Magpie version

1.0~git20231126.e106dfe

Use-cases

This is needed in order to handle cases like keyboard layout switching from the login manager (e.g. SDDM) or the installer (e.g. Calamares or Anaconda).

Proposal

Please add support for listening and dynamically configuring keyboard settings based on org.freedesktop.locale1.

References

Here are a couple of example implementations for other compositors:

• KWin: https://invent.kde.org/plasma/kwin/-/merge_requests/2921
• Sway: https://github.com/alebastr/sway-systemd/blob/main/src/locale1-xkb-config