Create CONTRIBUTING.md

Author: swaQQii

CONTRIBUTING.md

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+# Contributing Guidelines
+
+Thank you for your interest in **coredocs-netbox-scripts**.
+
+## Reporting Issues
+- First, check the [issue tracker](../../issues) to avoid duplicates.
+- Use the provided templates when opening a new issue (Bug or Feature).
+- For bugs, please include:
+  - Expected vs. actual behavior
+  - Steps to reproduce
+  - NetBox version
+  - Relevant logs or error messages
+
+## Pull Requests
+- Fork the repository and base your work on the `main` branch.
+- Create a branch in your fork for your changes (e.g. `my-fix` or `my-feature`).
+- Keep pull requests small and focused.
+- Clearly describe what changed, why it changed, and which NetBox versions you tested against.
+- Make sure all checks pass before submitting.
+
+## Compatibility
+- Target compatibility with **NetBox** (please state which version you tested against).
+- Do not introduce hidden dependencies.
+
+## Tests & Examples
+- If possible, provide a minimal example or test case to demonstrate the change or new feature.
+
+## Commit Messages
+- Use clear commit messages, prefixed when appropriate:
+  - `fix:` for bug fixes  
+  - `feat:` for new features  
+  - `docs:` for documentation changes  
+  - `refactor:` for code restructuring  
+  - `chore:` for maintenance tasks
+
+## Code of Conduct
+This project follows the [Code of Conduct](./CODE_OF_CONDUCT.md).  
+Violations can be reported via [GitHub Issues](../../issues).