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-precaching/utils/printCleanupDetails.js

@@ -0,0 +1,38 @@
+/*
+  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 { logger } from 'workbox-core/_private/logger.js';
+import '../_version.js';
+/**
+ * @param {string} groupTitle
+ * @param {Array<string>} deletedURLs
+ *
+ * @private
+ */
+const logGroup = (groupTitle, deletedURLs) => {
+    logger.groupCollapsed(groupTitle);
+    for (const url of deletedURLs) {
+        logger.log(url);
+    }
+    logger.groupEnd();
+};
+/**
+ * @param {Array<string>} deletedURLs
+ *
+ * @private
+ * @memberof workbox-precaching
+ */
+export function printCleanupDetails(deletedURLs) {
+    const deletionCount = deletedURLs.length;
+    if (deletionCount > 0) {
+        logger.groupCollapsed(`During precaching cleanup, ` +
+            `${deletionCount} cached ` +
+            `request${deletionCount === 1 ? ' was' : 's were'} deleted.`);
+        logGroup('Deleted Cache Requests', deletedURLs);
+        logger.groupEnd();
+    }
+}