docs: add pre-commit install guide on CONTRIBUTING.md (#995)

Co-authored-by: Felix Weinberger <[email protected]>

Author: dingo4dev

CONTRIBUTING.md

@@ -14,6 +14,12 @@ Thank you for your interest in contributing to the MCP Python SDK! This document
 uv sync --frozen --all-extras --dev
 ```
 
+6. Set up pre-commit hooks:
+
+```bash
+uv tool install pre-commit --with pre-commit-uv --force-reinstall
+```
+
 ## Development Workflow
 
 1. Choose the correct branch for your changes:
@@ -50,7 +56,13 @@ uv run ruff format .
 uv run scripts/update_readme_snippets.py
 ```
 
-8. Submit a pull request to the same branch you branched from
+8. (Optional) Run pre-commit hooks on all files:
+
+```bash
+pre-commit run --all-files
+```
+
+9. Submit a pull request to the same branch you branched from
 
 ## Code Style