feat: add LM Studio headless LMS server module

- Custom NixOS module wrapping the lms CLI (daemon + server)
- Supports auto-loading models on startup
- Optional nginx reverse proxy via domain option
- Security hardening (NoNewPrivileges, ProtectSystem, PrivateTmp)
- Follows existing myModules.* convention
- Enabled on this host on port 1234 (no models loaded yet)

configuration.nix

@@ -215,6 +215,14 @@
     ollamaUrl = "http://100.64.0.1:11434";
   };
 
+  # === LM Studio Headless LMS Server ===
+  myModules.lmstudio-server = {
+    enable = true;
+    port = 1234;
+    # domain = "llm.ashisgreat.xyz";  # Uncomment to add nginx reverse proxy
+    # models = [ "openai/gpt-oss-20b" ];  # Uncomment to auto-load models
+  };
+
   # === Backups (Restic + B2) ===
   myModules.backup = {
     enable = true;