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/fork-ts-checker-webpack-plugin/lib/ForkTsCheckerWebpackPluginState.js

@@ -0,0 +1,15 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+function createForkTsCheckerWebpackPluginState() {
+    return {
+        issuesReportPromise: Promise.resolve(undefined),
+        dependenciesReportPromise: Promise.resolve(undefined),
+        issuesPromise: Promise.resolve(undefined),
+        dependenciesPromise: Promise.resolve(undefined),
+        lastDependencies: undefined,
+        watching: false,
+        initialized: false,
+        webpackDevServerDoneTap: undefined,
+    };
+}
+exports.createForkTsCheckerWebpackPluginState = createForkTsCheckerWebpackPluginState;