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/formatter/BasicFormatter.js

@@ -0,0 +1,12 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const chalk_1 = __importDefault(require("chalk"));
+function createBasicFormatter() {
+    return function basicFormatter(issue) {
+        return chalk_1.default.grey(issue.code + ': ') + issue.message;
+    };
+}
+exports.createBasicFormatter = createBasicFormatter;