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/@rushstack/eslint-patch/lib/exports/eslint-bulk.d.ts

@@ -0,0 +1,2 @@
+import '../eslint-bulk-suppressions/cli/start';
+//# sourceMappingURL=eslint-bulk.d.ts.map

node_modules/@rushstack/eslint-patch/lib/exports/eslint-bulk.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"eslint-bulk.d.ts","sourceRoot":"","sources":["../../src/exports/eslint-bulk.ts"],"names":[],"mappings":"AAKA,OAAO,uCAAuC,CAAC"}

node_modules/@rushstack/eslint-patch/lib/exports/eslint-bulk.js

@@ -0,0 +1,7 @@
+"use strict";
+// Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT license.
+// See LICENSE in the project root for license information.
+Object.defineProperty(exports, "__esModule", { value: true });
+// "lib/exports/eslint-bulk" is the entry point for the @rushstack/eslint-bulk command line front end.
+require("../eslint-bulk-suppressions/cli/start");
+//# sourceMappingURL=eslint-bulk.js.map

node_modules/@rushstack/eslint-patch/lib/exports/eslint-bulk.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"eslint-bulk.js","sourceRoot":"","sources":["../../src/exports/eslint-bulk.ts"],"names":[],"mappings":";AAAA,4FAA4F;AAC5F,2DAA2D;;AAE3D,sGAAsG;AAEtG,iDAA+C","sourcesContent":["// Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT license.\n// See LICENSE in the project root for license information.\n\n// \"lib/exports/eslint-bulk\" is the entry point for the @rushstack/eslint-bulk command line front end.\n\nimport '../eslint-bulk-suppressions/cli/start';\n"]}