Add yat
hawaii-terminal-git: Add yat-git dependency
hawaii-system-preferences-git: Remove libqtxdg submodule
build-hawaii: Add yat-git
build-hawaii: Don't skip greenisland-git
Add hawaii-polkit-qt5-git
hawaii-system-preferences-git: Replace kf5-polkit-qt-git dependency
hawaii-shell-git: Replace kf5-polkit-qt-git dependency