feat: add tailwindcss and fix oxfmt

modules/capabilities/helix.nix

@@ -44,6 +44,8 @@
         package = inputs.helix.packages.${pkgs.stdenv.hostPlatform.system}.default;
         extraPackages = with pkgs; [
           svelteLanguageServer
+          tailwindcss-language-server
+
           nixd
           nixfmt
           oxfmt
@@ -91,13 +93,18 @@
             {
               name = "svelte";
               formatter = {
-                command = "oxfmt";
+                command = "${pkgs.coreutils}/bin/env";
-                args = [ "--stdin-filepath=%{buffer_name}" ];
+                args = [
+                  "NODE_PATH=%{workspace_directory}/node_modules"
+                  "oxfmt"
+                  "--stdin-filepath=%{buffer_name}"
+                ];
               };
               auto-format = true;
               language-servers = [
                 "scls"
                 "svelteserver"
+                "tailwindcss-ls"
               ];
             }
             {