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/eslint-plugin-jsx-a11y/lib/util/implicitRoles/a.js

@@ -0,0 +1,17 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports["default"] = getImplicitRoleForAnchor;
+var _jsxAstUtils = require("jsx-ast-utils");
+/**
+ * Returns the implicit role for an anchor tag.
+ */
+function getImplicitRoleForAnchor(attributes) {
+  if ((0, _jsxAstUtils.getProp)(attributes, 'href')) {
+    return 'link';
+  }
+  return '';
+}
+module.exports = exports.default;