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/logger/LoggerFactory.d.ts

@@ -0,0 +1,5 @@
+import webpack from 'webpack';
+import Logger from './Logger';
+declare type LoggerType = 'console' | 'webpack-infrastructure' | 'silent';
+declare function createLogger(type: LoggerType | Logger, compiler: webpack.Compiler): Logger;
+export { createLogger, LoggerType };