service/polkit: add service module to write Polkit agents

default.nix

@@ -21,6 +21,8 @@
   libgbm ? null,
   pipewire,
   pam,
+  polkit,
+  glib,
 
   gitRev ? (let
     headExists = builtins.pathExists ./.git/HEAD;
@@ -43,6 +45,7 @@
   withPam ? true,
   withHyprland ? true,
   withI3 ? true,
+  withPolkit ? true,
 }: let
   unwrapped = stdenv.mkDerivation {
     pname = "quickshell${lib.optionalString debug "-debug"}";
@@ -76,7 +79,8 @@
     ++ lib.optionals (withWayland && libgbm != null) [ libdrm libgbm ]
     ++ lib.optional withX11 xorg.libxcb
     ++ lib.optional withPam pam
-    ++ lib.optional withPipewire pipewire;
+    ++ lib.optional withPipewire pipewire
+    ++ lib.optionals withPolkit [ polkit glib ];
 
     cmakeBuildType = if debug then "Debug" else "RelWithDebInfo";
 
@@ -91,6 +95,7 @@
       (lib.cmakeBool "SCREENCOPY" (libgbm != null))
       (lib.cmakeBool "SERVICE_PIPEWIRE" withPipewire)
       (lib.cmakeBool "SERVICE_PAM" withPam)
+      (lib.cmakeBool "SERVICE_POLKIT" withPolkit)
       (lib.cmakeBool "HYPRLAND" withHyprland)
       (lib.cmakeBool "I3" withI3)
     ];