Add an above-all overlay mode for own_window_type, utility (#1402)

* Add libXdamage to flake.nix

* Add TYPE_UTILITY as above-all alternative to TYPE_OVERRIDE

* Click-through for TYPE_UTILITY

* Added libxfixes to MacOS CI workflow

* Disable building of XFIXES on MacOS

* Fix build for xinerama/xfixes on macos.

* Update Lua version check.

* Tidy this up.

* Fix BUILD_XFIXES on Linux

* Sigh, fix this.

---------

Co-authored-by: tranquillity-codes <dev@itycodes.org>
Co-authored-by: Brenden Matthews <brenden@brndn.io>

flake.nix

@@ -53,6 +53,8 @@
           xorg.libXext
           xorg.libXft
           xorg.libXinerama
+          xorg.libXdamage
+          xorg.libXfixes
         ];
       };
     };