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/hooks/pluginHooks.d.ts

@@ -0,0 +1,20 @@
+import * as webpack from 'webpack';
+import { SyncHook, SyncWaterfallHook, AsyncSeriesWaterfallHook } from 'tapable';
+import { FilesChange } from '../reporter';
+import { Issue } from '../issue';
+declare function createForkTsCheckerWebpackPluginHooks(): {
+    start: AsyncSeriesWaterfallHook<FilesChange, webpack.compilation.Compilation, any>;
+    waiting: SyncHook<webpack.compilation.Compilation, any, any>;
+    canceled: SyncHook<webpack.compilation.Compilation, any, any>;
+    error: SyncHook<Error, webpack.compilation.Compilation, any>;
+    issues: SyncWaterfallHook<Issue[], webpack.compilation.Compilation | undefined, void>;
+};
+declare type ForkTsCheckerWebpackPluginHooks = ReturnType<typeof createForkTsCheckerWebpackPluginHooks>;
+declare function getForkTsCheckerWebpackPluginHooks(compiler: webpack.Compiler | webpack.MultiCompiler): {
+    start: AsyncSeriesWaterfallHook<FilesChange, webpack.compilation.Compilation, any>;
+    waiting: SyncHook<webpack.compilation.Compilation, any, any>;
+    canceled: SyncHook<webpack.compilation.Compilation, any, any>;
+    error: SyncHook<Error, webpack.compilation.Compilation, any>;
+    issues: SyncWaterfallHook<Issue[], webpack.compilation.Compilation | undefined, void>;
+};
+export { getForkTsCheckerWebpackPluginHooks, ForkTsCheckerWebpackPluginHooks };