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-core/registerQuotaErrorCallback.js

@@ -0,0 +1,34 @@
+/*
+  Copyright 2019 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 { logger } from './_private/logger.js';
+import { assert } from './_private/assert.js';
+import { quotaErrorCallbacks } from './models/quotaErrorCallbacks.js';
+import './_version.js';
+/**
+ * Adds a function to the set of quotaErrorCallbacks that will be executed if
+ * there's a quota error.
+ *
+ * @param {Function} callback
+ * @memberof workbox-core
+ */
+// Can't change Function type
+// eslint-disable-next-line @typescript-eslint/ban-types
+function registerQuotaErrorCallback(callback) {
+    if (process.env.NODE_ENV !== 'production') {
+        assert.isType(callback, 'function', {
+            moduleName: 'workbox-core',
+            funcName: 'register',
+            paramName: 'callback',
+        });
+    }
+    quotaErrorCallbacks.add(callback);
+    if (process.env.NODE_ENV !== 'production') {
+        logger.log('Registered a callback to respond to quota errors.', callback);
+    }
+}
+export { registerQuotaErrorCallback };