docs: add Contributing section to README

- Add standard contribution workflow and guidelines
- Include development setup instructions
- Add code standards with cargo fmt and clippy
- Link to GitLab issue tracker for bug reports

Author: JMLX42

README.md

@@ -25,6 +25,45 @@ This enables AI assistants to interact with REST APIs through a standardized int
 - **Comprehensive Testing**: Includes integration tests with JavaScript and Python MCP clients
 - **Built with Official SDK**: Uses the official Rust MCP SDK for reliable protocol compliance
 
+## Contributing
+
+We welcome contributions to `rmcp-openapi`! Please follow these guidelines:
+
+### How to Contribute
+
+1. **Fork the repository** on GitLab
+2. **Create a feature branch** from `main`: `git checkout -b feature/my-new-feature`
+3. **Make your changes** and ensure they follow the project's coding standards
+4. **Add tests** for your changes if applicable
+5. **Run the test suite** to ensure nothing is broken: `cargo test`
+6. **Commit your changes** with clear, descriptive commit messages
+7. **Push to your fork** and **create a merge request**
+
+### Development Setup
+
+```bash
+# Clone your fork
+git clone https://gitlab.com/your-username/rmcp-openapi.git
+cd rmcp-openapi
+
+# Build the project
+cargo build --workspace
+
+# Run tests
+cargo test
+```
+
+### Code Standards
+
+- Follow Rust conventions and use `cargo fmt` to format code
+- Run `cargo clippy --all-targets` to catch common mistakes
+- Add documentation for public APIs
+- Include tests for new functionality
+
+### Reporting Issues
+
+Found a bug or have a feature request? Please report it on our [GitLab issue tracker](https://gitlab.com/lx-industries/rmcp-openapi/-/issues).
+
 ## Installation
 
 ### Install Server Binary