Move window manager exclusive to wm module

modules/wm/ags/default.nix

@@ -0,0 +1,48 @@
+{pkgs, ...}: let
+  covercolors = pkgs.stdenv.mkDerivation {
+    name = "covercolors";
+    dontUnpack = true;
+    propagatedBuildInputs = [
+      (pkgs.python3.withPackages (pyPkgs:
+        with pyPkgs; [
+          material-color-utilities
+          pillow
+        ]))
+    ];
+    installPhase = "install -Dm755 ${./covercolors.py} $out/bin/covercolors";
+  };
+  systemdTarget = "graphical-session.target";
+  # TODO: Add this in the offcial ags derivation
+  ags = pkgs.ags.overrideAttrs (_: prev: {
+    buildInputs = prev.buildInputs ++ [pkgs.libdbusmenu-gtk3];
+  });
+in {
+  home.packages = with pkgs; [
+    # TODO: Remove this after testing
+    ags
+    # TODO: Find a way to add this for ags only
+    covercolors
+    brightnessctl
+  ];
+  systemd.user.services.ags = {
+    Unit = {
+      Description = " A customizable and extensible shell ";
+      PartOf = systemdTarget;
+      Requires = systemdTarget;
+      After = systemdTarget;
+    };
+
+    Service = {
+      Type = "simple";
+      ExecStart = "${pkgs.ags}/bin/ags";
+      Restart = "always";
+    };
+
+    Install = {WantedBy = [systemdTarget];};
+  };
+
+  xdg.configFile."ags" = {
+    source = ./.;
+    recursive = true;
+  };
+}