Initial commit: Developer Tools MVP with visual editor

- Complete React app with 7 developer tools
- JSON Tool with visual structured editor
- Serialize Tool with visual structured editor
- URL, Base64, CSV/JSON, Beautifier, Diff tools
- Responsive navigation with dropdown menu
- Dark/light mode toggle
- Mobile-responsive design with sticky header
- All tools working with copy/paste functionality

node_modules/workbox-routing/src/index.ts

@@ -0,0 +1,35 @@
+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import {
+  NavigationRoute,
+  NavigationRouteMatchOptions,
+} from './NavigationRoute.js';
+import {RegExpRoute} from './RegExpRoute.js';
+import {registerRoute} from './registerRoute.js';
+import {Route} from './Route.js';
+import {Router} from './Router.js';
+import {setCatchHandler} from './setCatchHandler.js';
+import {setDefaultHandler} from './setDefaultHandler.js';
+
+import './_version.js';
+
+/**
+ * @module workbox-routing
+ */
+
+export {
+  NavigationRoute,
+  RegExpRoute,
+  registerRoute,
+  Route,
+  Router,
+  setCatchHandler,
+  setDefaultHandler,
+  NavigationRouteMatchOptions,
+};