Draft: wayland: add support for the xdg toplevel tag protocol
It allows applications to tag their windows with a name, like "main window", "email composer", "pip video" or similar, which the compositor can use for window rules or restoring state of application windows without xdg session management support.
Wayland-protocols MR: https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/238
Draft because I should still add support for the window tag to window rules
Edited by Xaver Hugl