Add user-specific configurations for Emacs and Stylix across multiple hosts

Updated the configuration files for miniserver, server, and workstation to include user-specific settings for Emacs and Stylix. This change enhances user management consistency and aligns with the recent refactor for multi-user support in the configuration.

config/derek.nix

@@ -27,6 +27,14 @@ in
       tools = enableForDerek;
       multimedia = enableForDerek;
     };
+    stylix = {
+      enable = true;
+      users = "bearded_dragonn";
+    };
+    emacs = {
+      enable = true;
+      users = "bearded_dragonn";
+    };
   };
   sops.secrets = lib.mkIf config.my.secureHost {
     derek-password.neededForUsers = true;