x11-wm/lxqt-wayland-session: New port: Files needed for the LXQt Wayland Session

Files needed for the LXQt Wayland Session: Wayland session start script, its
desktop entry for display managers and default configurations for actually
supported compositors which are:

• Stacking WMs
• Labwc
• Wayfire
• kwin_wayland
• Tiling Wms
• Hyprland
• river
• Sway