Make less known wayland compositors usable (#32285)

* bemenu: init at 2017-02-14

* velox: 2015-11-03 -> 2017-07-04

* orbment, velox: don't expose subprojects

the development of orbment and velox got stuck
their subprojects (bemenu, dmenu-wayland, st-wayland) don't work correctly outside of parent projects
so hide them to not confuse people
swc and wld libraries are unpopular and unlike wlc are not used by anything except velox

* pythonPackages.pydbus: init at 0.6.0

* way-cooler: 0.5.2 -> 0.6.2

* nixos/way-cooler: add module

* dconf module: use for wayland

non-invasive approach for #31293
see discussion at #32210

* sway: embed LD_LIBRARY_PATH for #32755

* way-cooler: switch from buildRustPackage to buildRustCrate #31150

nixos/modules/programs/sway.nix

@@ -6,8 +6,7 @@ let
   cfg = config.programs.sway;
   sway = pkgs.sway;
 
-  swayWrapped = pkgs.writeScriptBin "sway" ''
-    #! ${pkgs.stdenv.shell}
+  swayWrapped = pkgs.writeShellScriptBin "sway" ''
     if [ "$1" != "" ]; then
       sway-setcap "$@"
       exit
@@ -65,8 +64,10 @@ in
     };
 
     users.extraGroups.sway = {};
+    security.pam.services.swaylock = {};
 
     hardware.opengl.enable = mkDefault true;
     fonts.enableDefaultFonts = mkDefault true;
+    programs.dconf.enable = mkDefault true;
   };
 }