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/@jest/reporters/build/index.d.ts

@@ -0,0 +1,27 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+import getResultHeader from './getResultHeader';
+export type { Config } from '@jest/types';
+export type { AggregatedResult, SnapshotSummary, TestResult, } from '@jest/test-result';
+export { default as BaseReporter } from './BaseReporter';
+export { default as CoverageReporter } from './CoverageReporter';
+export { default as DefaultReporter } from './DefaultReporter';
+export { default as NotifyReporter } from './NotifyReporter';
+export { default as SummaryReporter } from './SummaryReporter';
+export { default as VerboseReporter } from './VerboseReporter';
+export type { Context, Reporter, ReporterOnStartOptions, SummaryOptions, Test, } from './types';
+export declare const utils: {
+    formatTestPath: (config: import("@jest/types/build/Config").ProjectConfig | import("@jest/types/build/Config").GlobalConfig, testPath: string) => string;
+    getResultHeader: typeof getResultHeader;
+    getSummary: (aggregatedResults: import("@jest/test-result").AggregatedResult, options?: import("./types").SummaryOptions | undefined) => string;
+    printDisplayName: (config: import("@jest/types/build/Config").ProjectConfig) => string;
+    relativePath: (config: import("@jest/types/build/Config").ProjectConfig | import("@jest/types/build/Config").GlobalConfig, testPath: string) => {
+        basename: string;
+        dirname: string;
+    };
+    trimAndFormatPath: (pad: number, config: import("@jest/types/build/Config").ProjectConfig | import("@jest/types/build/Config").GlobalConfig, testPath: string, columns: number) => string;
+};