nixos/corectrl: add package option

Co-authored-by: Emily <git@emilylange.de>

nixos/modules/hardware/corectrl.nix

@@ -12,6 +12,10 @@ in
       Add your user to the corectrl group to run corectrl without needing to enter your password
     '');
 
+    package = mkPackageOption pkgs "corectrl" {
+      extraDescription = "Useful for overriding the configuration options used for the package.";
+    };
+
     gpuOverclock = {
       enable = mkEnableOption (lib.mdDoc ''
         GPU overclocking
@@ -32,9 +36,9 @@ in
 
   config = mkIf cfg.enable (lib.mkMerge [
     {
-      environment.systemPackages = [ pkgs.corectrl ];
+      environment.systemPackages = [ cfg.package ];
 
-      services.dbus.packages = [ pkgs.corectrl ];
+      services.dbus.packages = [ cfg.package ];
 
       users.groups.corectrl = { };