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/dom/dist/queries/all-utils.js

@@ -0,0 +1,49 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+var _matches = require("../matches");
+Object.keys(_matches).forEach(function (key) {
+  if (key === "default" || key === "__esModule") return;
+  if (key in exports && exports[key] === _matches[key]) return;
+  Object.defineProperty(exports, key, {
+    enumerable: true,
+    get: function () {
+      return _matches[key];
+    }
+  });
+});
+var _getNodeText = require("../get-node-text");
+Object.keys(_getNodeText).forEach(function (key) {
+  if (key === "default" || key === "__esModule") return;
+  if (key in exports && exports[key] === _getNodeText[key]) return;
+  Object.defineProperty(exports, key, {
+    enumerable: true,
+    get: function () {
+      return _getNodeText[key];
+    }
+  });
+});
+var _queryHelpers = require("../query-helpers");
+Object.keys(_queryHelpers).forEach(function (key) {
+  if (key === "default" || key === "__esModule") return;
+  if (key in exports && exports[key] === _queryHelpers[key]) return;
+  Object.defineProperty(exports, key, {
+    enumerable: true,
+    get: function () {
+      return _queryHelpers[key];
+    }
+  });
+});
+var _config = require("../config");
+Object.keys(_config).forEach(function (key) {
+  if (key === "default" || key === "__esModule") return;
+  if (key in exports && exports[key] === _config[key]) return;
+  Object.defineProperty(exports, key, {
+    enumerable: true,
+    get: function () {
+      return _config[key];
+    }
+  });
+});