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/ForkTsCheckerWebpackPluginConfiguration.d.ts

@@ -0,0 +1,17 @@
+import webpack from 'webpack';
+import { ForkTsCheckerWebpackPluginOptions } from './ForkTsCheckerWebpackPluginOptions';
+import { IssueConfiguration } from './issue/IssueConfiguration';
+import { FormatterConfiguration } from './formatter';
+import { TypeScriptReporterConfiguration } from './typescript-reporter/TypeScriptReporterConfiguration';
+import { EsLintReporterConfiguration } from './eslint-reporter/EsLintReporterConfiguration';
+import { LoggerConfiguration } from './logger/LoggerConfiguration';
+interface ForkTsCheckerWebpackPluginConfiguration {
+    async: boolean;
+    typescript: TypeScriptReporterConfiguration;
+    eslint: EsLintReporterConfiguration;
+    issue: IssueConfiguration;
+    formatter: FormatterConfiguration;
+    logger: LoggerConfiguration;
+}
+declare function createForkTsCheckerWebpackPluginConfiguration(compiler: webpack.Compiler, options?: ForkTsCheckerWebpackPluginOptions): ForkTsCheckerWebpackPluginConfiguration;
+export { ForkTsCheckerWebpackPluginConfiguration, createForkTsCheckerWebpackPluginConfiguration };