helix: Force true-color. Added typescript package for LSP. Render whitespaces

roles/home/helix.nix

@@ -12,6 +12,7 @@
 
       [editor]
       cursorline = true
+      true-color = true
 
       [editor.cursor-shape]
       insert = "bar"
@@ -23,6 +24,9 @@
 
       [editor.indent-guides]
       render = true
+      
+      [editor.whitespace]
+      render = "all"
     '';
 
     packages = with pkgs.unstable; [
@@ -32,6 +36,7 @@
       rnix-lsp
       python310Packages.python-lsp-server
       texlab
+      nodePackages.typescript
     ];
   };
 }