add monorepo structure doc for TEN frontend projects

packages/README.md

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+# Monorepo Structure for TEN Frontend Projects
+
+This repository uses a monorepo setup to manage multiple frontend projects and shared resources such as components, utilities, and hooks. The structure enhances code reuse, maintainability, and collaboration across projects like **Tenscan**, **Gateway**, **Bridge**, and more.
+
+## Folder Structure
+
+```bash
+📁 packages
+├── 📁 apis - Server-side logic, API routes, and backend services
+│   ├── 📁 .config - Configuration files for the APIs
+│   ├── 📁 src - Source files for API logic
+│   └── 📁 storage - Storage-related logic or utilities
+├── 📁 eslint-config - Centralized ESLint configuration for all frontend projects
+├── 📁 shared - Reusable components, hooks, and utilities shared across frontend apps
+│   └── 📁 src - Main directory containing shared code
+├── 📁 typescript-config - Centralized TypeScript configurations
+│   ├── 📄 base.json - Base TypeScript configuration for general projects
+│   ├── 📄 nextjs.json - Configuration specific to Next.js projects
+│   └── 📄 react-library.json - Configuration for React libraries
+└── 📁 ui - 
+    ├── 📁 api - API logic consumed by the frontend
+    ├── 📁 components - Reusable React components used in the UI
+    ├── 📁 hooks - Custom hooks used across the frontend
+    ├── 📁 lib - Utility functions used across the frontend
+    ├── 📁 public - Static files such as images and assets
+    ├── 📁 services - External service interactions like APIs
+    ├── 📁 routes - Routing configuration and route-related logic
+    └── 📁 stores - Global state mgt
+```
+
+## Getting Started
+
+1. **Clone the Repository:**
+
+   ```bash
+   git clone https://github.com/ten-protocol/go-ten.git
+   ```
+
+2. **Install Dependencies:**
+
+   ```bash
+   pnpm install
+   ```
+
+3. **Navigate to the Project:**
+
+   ```bash
+   Tenscan: cd tools/tenscan/frontend
+   Gateway: cd tools/walletextension/frontend
+   Bridge: cd tools/bridge-frontend
+   ```
+
+4. **Run the Project:**
+
+   ```bash
+    pnpm dev
+    ```
+
+
+## Built With
+
+- [Next.js](https://nextjs.org/)
+- [Tailwind CSS](https://tailwindcss.com/)
+- [TypeScript](https://www.typescriptlang.org/)
+
+## Contributing
+
+Contributions are welcome! Follow our [contribution guidelines](/docs/_docs/community/contributions.md).
+
+## License
+
+This project is licensed under the [GNU Affero General Public License v3.0](/LICENSE).