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/jest-snapshot/node_modules/jest-util/build/preRunMessage.js

@@ -0,0 +1,48 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.remove = exports.print = void 0;
+
+function _chalk() {
+  const data = _interopRequireDefault(require('chalk'));
+
+  _chalk = function () {
+    return data;
+  };
+
+  return data;
+}
+
+var _clearLine = _interopRequireDefault(require('./clearLine'));
+
+var _isInteractive = _interopRequireDefault(require('./isInteractive'));
+
+function _interopRequireDefault(obj) {
+  return obj && obj.__esModule ? obj : {default: obj};
+}
+
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+const print = stream => {
+  if (_isInteractive.default) {
+    stream.write(
+      _chalk().default.bold.dim('Determining test suites to run...')
+    );
+  }
+};
+
+exports.print = print;
+
+const remove = stream => {
+  if (_isInteractive.default) {
+    (0, _clearLine.default)(stream);
+  }
+};
+
+exports.remove = remove;