helix: Added VSCode lang servers

roles/home/helix.nix

@@ -8,7 +8,7 @@
     };
 
     file.".config/helix/config.toml".text = ''
-      theme = "monokai_pro_spectrum"
+      theme = "monokai_pro_ristretto"
 
       [editor]
       cursorline = true
@@ -34,6 +34,7 @@
       python310Packages.python-lsp-server
       texlab
       nodePackages.typescript
+      nodePackages.vscode-langservers-extracted
     ];
   };
 }