docs: add CONTRIBUTING.md guidelines

Author: Rzbyte

CONTRIBUTING.md

@@ -0,0 +1,22 @@
+# Contributing to SafeHands
+
+First off, thank you for considering contributing to SafeHands! It's people like you that make SafeHands such a great tool for Web3 Agent Security.
+
+## How Can I Contribute?
+
+### Reporting Bugs
+Bugs are tracked as GitHub issues. When creating an issue, please explain the behavior you expected and the behavior you actually observed. Provide as much context as possible and describe the reproduction steps.
+
+### Suggesting Enhancements
+Enhancement suggestions are also tracked as GitHub issues. Please provide a clear and detailed explanation of the feature you want, why it is needed, and how it should work.
+
+### Pull Requests
+1. Fork the repo and create your branch from main.
+2. If you've added code that should be tested, add tests.
+3. If you've changed APIs, update the documentation.
+4. Ensure the test suite passes.
+5. Make sure your code conforms to the existing style.
+6. Issue that pull request!
+
+## Code of Conduct
+By participating in this project, you agree to abide by standard open-source professional conduct. Harassment or abusive behavior will not be tolerated.