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/@testing-library/user-event/dist/keyboard/shared/fireChangeForInputTimeIfValid.js

@@ -0,0 +1,20 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.fireChangeForInputTimeIfValid = fireChangeForInputTimeIfValid;
+
+var _dom = require("@testing-library/dom");
+
+var _utils = require("../../utils");
+
+function fireChangeForInputTimeIfValid(el, prevValue, timeNewEntry) {
+  if ((0, _utils.isValidInputTimeValue)(el, timeNewEntry) && prevValue !== timeNewEntry) {
+    _dom.fireEvent.change(el, {
+      target: {
+        value: timeNewEntry
+      }
+    });
+  }
+}