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/tailwindcss/stubs/.npmignore

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+!*

node_modules/tailwindcss/stubs/.prettierrc.json

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+{
+  "printWidth": 120,
+  "semi": false,
+  "singleQuote": true,
+  "trailingComma": "es5"
+}

node_modules/tailwindcss/stubs/config.simple.js

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+module.exports = {
+  content: [],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+}

node_modules/tailwindcss/stubs/postcss.config.cjs

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+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+}

node_modules/tailwindcss/stubs/postcss.config.js

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+export default {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+}

node_modules/tailwindcss/stubs/tailwind.config.cjs

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+/** @type {import('tailwindcss').Config} */
+module.exports = __CONFIG__

node_modules/tailwindcss/stubs/tailwind.config.js

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+/** @type {import('tailwindcss').Config} */
+export default __CONFIG__

node_modules/tailwindcss/stubs/tailwind.config.ts

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+import type { Config } from 'tailwindcss'
+
+export default __CONFIG__ satisfies Config