refactor: Add CONTRIBUTING.md and update README.md

This commit adds a CONTRIBUTING.md file to provide guidelines for contributing to the MTS SDK project. It also updates the README.md file with usage examples and information about the Assets service in the MyTonSwap client.

[Issue #123]

CONTRIBUTING.md

@@ -0,0 +1,44 @@
+# Contributing to MTS SDK
+
+Thank you for considering contributing to the MTS SDK project! We welcome contributions from the community and are grateful for your support.
+
+## How to Contribute
+
+### Reporting Bugs
+
+If you find a bug, please report it by opening an issue on our [GitHub Issues](https://github.com/your-repo/mts-sdk/issues) page. Provide as much detail as possible, including steps to reproduce the issue and any relevant logs or screenshots.
+
+### Feature Requests
+
+We are always looking to improve the MTS SDK. If you have a feature request, please open an issue on our [GitHub Issues](https://github.com/your-repo/mts-sdk/issues) page and describe the feature in detail.
+
+### Submitting Changes
+
+1. **Fork the Repository**: Fork the project on GitHub and clone your fork locally.
+2. **Create a Branch**: Create a new branch for your changes (`git checkout -b my-feature-branch`).
+3. **Make Changes**: Make your changes to the codebase.
+4. **Commit Changes**: Commit your changes with a clear and concise commit message (`git commit -m "Add new feature"`).
+5. **Push Changes**: Push your changes to your fork (`git push origin my-feature-branch`).
+6. **Open a Pull Request**: Open a pull request on the main repository and provide a detailed description of your changes.
+
+### Code Style
+
+Please ensure your code adheres to the project's coding standards. We use [Prettier](https://prettier.io/) for code formatting. Run `npm run format` before committing your changes.
+
+### Testing
+
+Ensure that your changes do not break existing tests and add new tests for any new functionality. Run the test suite using `npm test`.
+
+### Documentation
+
+Update the documentation to reflect any changes or new features. This includes updating the README.md and any other relevant documentation files.
+
+## Code of Conduct
+
+Please note that this project is released with a [Contributor Code of Conduct](CODE_OF_CONDUCT.md). By participating in this project, you agree to abide by its terms.
+
+## Getting Help
+
+If you need help or have any questions, feel free to reach out by opening an issue or contacting the maintainers.
+
+Thank you for your contributions!

README.md

@@ -5,15 +5,48 @@
 <p align="center">SDK for MyTonSwap DEX aggregator</p>
 
 
-### ⚠️ Active Development Notice ⚠️
-This project is currently under active development and is not yet ready for public use.
-
-We recommend you DO NOT use this project in production environments until a stable release is announced. Expect frequent changes, updates, and possible breaking changes during this phase.
-
-
 Installation:
 
 ```bash
 npm install @mytonswap/sdk
 ```
 
+## Usage
+
+Here's a basic example of how to use the MyTonSwap SDK:
+
+```ts
+import { MyTonSwapClient } from '@mytonswap/sdk';
+
+const client = new MyTonSwapClient();
+
+async function performSwap() {
+  const userWallet = 'your-wallet-address';
+  const TON = await client.assets.getExactAsset('TON');
+  const NOT = await client.assets.getExactAsset('NOT');
+  const bestRoute = await client.router.findBestRoute(
+    TON!.address,
+    NOT!.address,
+    toNano(1),
+    1,
+  );
+
+  const swap = await client.swap.createSwap(userWallet, bestRoute);
+  console.log(swap);
+}
+
+performSwap();
+```
+
+
+## Contributing
+
+We welcome contributions! Please read our [contributing guidelines](CONTRIBUTING.md) before submitting a pull request.
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
+
+## Support
+
+If you have any questions or need help, feel free to open an issue on our [GitHub repository](https://github.com/MyTonSwap/sdk/issues).