[MISC] add CONTRIBUTING.md

CONTRIBUTING.md

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+# Contributing to Genesis
+
+Thank you for your interest in contributing to Genesis! We welcome contributions from everyone. Please take a moment to review this guide to ensure a smooth collaboration.
+
+- [Reporting Bugs](#reporting-bugs)
+- [Suggesting Features](#suggesting-features)
+- [Submitting Code Changes](#submitting-code-changes)
+- [Reviewing and Merging](#reviewing-and-merging)
+- [Questions and Discussions](#questions-and-discussions)
+---
+
+### Reporting Bugs
+
+- Before reporting a bug, please search through existing issues to check if it has already been reported.
+
+- If the issue hasn't been reported yet, please use our issue templates to provide as much detail as possible in your report.
+
+  ```markdown
+  **Description**
+  A clear and concise description of what the bug is.
+
+  **To Reproduce**
+  Example code or commands to reproduce the bug.
+
+  **Expected behavior**
+  A clear and concise description of what you expected to happen.
+
+  **Screenshots**
+  If applicable, add screenshots to help explain your problem.
+
+  **Environment:**
+   - OS: [e.g., Linux, macOS]
+   - GPU/CPU: [e.g., A100, RTX 4090, M3pro]
+
+  **Additional context**
+  Add any other context about the problem here.
+  ```
+
+### Suggesting Features
+- If you have a feature idea, please create an issue labeled `enhancement`.
+- In the created issue, please provide context, expected outcomes, and potential.
+
+### Submitting Code Changes
+
+- We use the `pre-commit` configuration to automatically clean up code before committing. Install and run `pre-commit` as follows:
+  1. Install `pre-commit`:
+     ```bash
+     pip install pre-commit
+     ```
+  2. Install hooks from the configuration file:
+     ```bash
+     pre-commit install
+     ```
+     After this, `pre-commit` will automatically check and clean up code whenever you make a commit.
+- (Optional) You can run CI tests locally to ensure you pass the online CI checks.
+  ```python
+  python -m unittest discover tests
+  ```
+- In the title of your Pull Request, please include [BUG FIX], [FEATURE] or [MISC] to indicate the purpose.
+- In the description, please provide example code or commands for testing.
+
+### Reviewing and Merging
+
+- PRs require at least one approval before merging.
+- Automated checks (e.g., CI tests) must pass.
+- Use `Squash and Merge` for a clean commit history.
+
+### Questions and Discussions
+- Use [Discussions](https://github.com/Genesis-Embodied-AI/Genesis/discussions) for open-ended topics.
+<!-- 
+### Join Us
+- Follow the project’s progress and updates on [channel/community link]. -->
+
+---
+
+We appreciate your contributions and look forward to collaborating with you!
+
+Thank you,  
+Genesis Maintainers