Implement missing features for wayland client

[akallabeth]

The wayland client is currently a very poor proof of concept.
Any help to improve the current situation is welcome.

If you're interested the following features and fix existing issues are currently unsolved:

• Mouse cursor support wayland client: mouse does not work (crash or invisible) #3415
• Display resizing support via display channel Implemented wayland display resize channel. #5159
• Window decorations Wayland window decoration and resize support #5165
  • Fallback to client side decorations
• Clipboard support Wayland Clipboard support #3414 Wayland clipboard #5160
  • Additional clipboard formats [wayland] additional clipboard formats #5220
• Keyboard grab Wayland add shortcut inhibit support #4799
• Fullscreen shell wayland fullscreen shell support #5162
• Multimonitor Wayland multimonitor support #5163
• Fix drawing issues Wayland client does no longer repaint when focus lost #5161
• RAIL support Wayland RAIL support #5164
• Window fixed size vs resizable support Wayland smart scaling support #5215

[eMPee584]

+

• window rotation support
• 😃

[akallabeth]

@eMPee584 hmm, nice idea. #5159 should already implement the client server communication part, so it should be a simple matter of reading the current state in case of configure

[pnowack]

Fallback to client side decorations

For client side decorations, libdecor can be used (current upstream repo is at https://gitlab.gnome.org/jadahl/libdecor (in the future maybe on freedesktops gitlab (https://gitlab.freedesktop.org/freedesktop/freedesktop/-/issues/420))).
It is packaged in current distros (F34+, Archlinux, ...)

[akallabeth]

wayland client will be deprecated and replaced with sdl-client.