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

pkgs/applications/misc/dmenu/wayland.nix

@@ -1,34 +0,0 @@
-{stdenv, fetchurl #, libX11, libXinerama, enableXft, libXft, zlib
-, swc, wld, wayland, libxkbcommon, pixman, fontconfig
-}:
-
-with stdenv.lib;
-
-stdenv.mkDerivation rec {
-  name = "dmenu-wayland-${version}";
-  version = "git-2017-04-07";
-  rev = "f385d9d18813071b4b4257bf8d4d572daeda0e70";
-
-  src = fetchurl {
-    url = "https://github.com/michaelforney/dmenu/archive/${rev}.tar.gz";
-    sha256 = "0y1jvh2815c005ns0bsjxsmz82smw22n6jsfg2g03a1pacakp6ys";
-  };
-
-  buildInputs = [ swc wld wayland libxkbcommon pixman fontconfig ];
-
-  postPatch = ''
-    sed -ri -e 's!\<(dmenu|dmenu_path)\>!'"$out/bin"'/&!g' dmenu_run
-  '';
-
-  preConfigure = [
-    ''sed -i "s@PREFIX = /usr/local@PREFIX = $out@g; s@/usr/share/swc@${swc}/share/swc@g" config.mk''
-  ];
-
-  meta = {
-      description = "A generic, highly customizable, and efficient menu for the X Window System";
-      homepage = http://tools.suckless.org/dmenu;
-      license = stdenv.lib.licenses.mit;
-      maintainers = with stdenv.lib.maintainers; [ ];
-      platforms = with stdenv.lib.platforms; all;
-  };
-}