Refactor user management in configuration files for enhanced consistency

Updated multiple configuration files to implement a unified approach for user management across applications and services. Introduced `mkEnabledWithUsers` to streamline user configuration, improving maintainability and flexibility in multi-user setups.

config/derek.nix

@@ -4,31 +4,28 @@
   pkgs,
   ...
 }:
+let
+  enableForDerek = {
+    enable = true;
+    users = "bearded_dragonn";
+  };
+in
 {
   my = {
     apps = {
-      art.enable = true;
-      art.users = "bearded_dragonn";
-      gaming.enable = true;
-      gaming.users = "bearded_dragonn";
-      multimedia.videoEditing.enable = true;
-      multimedia.videoEditing.users = "bearded_dragonn";
+      art = enableForDerek;
+      gaming = enableForDerek;
+      multimedia.videoEditing = enableForDerek;
     };
     dev = {
-      nix.enable = true;
-      nix.users = "bearded_dragonn";
-      python.enable = true;
-      python.users = "bearded_dragonn";
-      sh.enable = true;
-      sh.users = "bearded_dragonn";
+      nix = enableForDerek;
+      python = enableForDerek;
+      sh = enableForDerek;
     };
     shell = {
-      exercism.enable = true;
-      exercism.users = "bearded_dragonn";
-      tools.enable = true;
-      tools.users = "bearded_dragonn";
-      multimedia.enable = true;
-      multimedia.users = "bearded_dragonn";
+      exercism = enableForDerek;
+      tools = enableForDerek;
+      multimedia = enableForDerek;
     };
   };
   sops.secrets = lib.mkIf config.my.secureHost {