feat(browser): Add .gitignore and README.md for Repomix extension

browser/.gitignore

@@ -0,0 +1,48 @@
+# Dependencies
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Build output
+dist/
+packages/
+
+# Environment variables
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Logs
+*.log
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Coverage directory used by tools like istanbul
+coverage/
+
+# Temporary folders
+tmp/
+temp/

browser/README.md

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+# Repomix
+
+A browser extension that adds a Repomix button to GitHub repository pages.
+
+![Repomix Button Demo](https://via.placeholder.com/800x400/f0f0f0/333333?text=Repomix+Button+Demo)
+
+## 🚀 Features
+
+- Adds a "Repomix" button to GitHub repository pages
+- One-click redirect to Repomix (https://repomix.com)
+- Seamlessly integrates with GitHub's UI design
+- Works on Chrome, Firefox, and Edge
+
+## 🛠️ Usage
+
+1. Install the browser extension
+2. Navigate to any GitHub repository page
+3. A "Repomix" button will appear in the page header action area
+4. Click the button to open the repository in Repomix
+
+## 💻 Development
+
+### Prerequisites
+
+- Node.js 22 or higher
+
+### Setup
+
+```bash
+# Install dependencies
+npm install
+
+# Generate icons
+npm run generate-icons
+
+# Development mode for Chrome
+npm run dev chrome
+
+# Development mode for Firefox
+npm run dev firefox
+
+# Development mode for Edge
+npm run dev edge
+```
+
+### Build
+
+```bash
+# Build for all browsers
+npm run build-all
+
+# Build for specific browsers
+npm run build chrome
+npm run build firefox
+npm run build edge
+```
+
+Built files will be generated in the `dist/` folder.
+
+### Manual Installation
+
+1. Run `npm run build chrome` to build
+2. Open `chrome://extensions/` in Chrome
+3. Enable "Developer mode"
+4. Click "Load unpacked extension"
+5. Select the `dist/chrome` folder
+
+## 📝 Technical Specifications
+
+- **Manifest V3** - Latest browser extension specification
+- **Content Scripts** - Direct button injection into GitHub pages
+- **Internationalization** - English and Japanese support
+- **Cross-browser** - Chrome, Firefox, Edge support
+
+## 🔒 Privacy
+
+This extension:
+- Does not collect any data
+- Does not track user behavior
+- Only accesses github.com
+- Requires minimal permissions
+
+## 📄 License
+
+MIT License
+
+## 🙋‍♂️ Related Projects
+
+- [Repomix](https://github.com/yamadashy/repomix) - AI-friendly repository packing tool
+- [Repomix Website](https://repomix.com) - Online version of Repomix 

browser/app/manifest.json

@@ -1,6 +1,6 @@
 {
-  "name": "GitHub Repomix Button (Unofficial)",
-  "short_name": "gh-repomix",
+  "name": "Repomix",
+  "short_name": "repomix",
   "version": "1.0.0",
   "manifest_version": 3,
   "description": "__MSG_appDescription__",

browser/package.json

@@ -1,6 +1,6 @@
 {
   "private": true,
-  "name": "github-repomix-button",
+  "name": "repomix",
   "version": "1.0.0",
   "description": "A browser extension that adds a Repomix button to GitHub repositories",
   "scripts": {