docs: add comprehensive developer setup guide

[mecampbellsoup]

Summary

• Enhanced CONTRIBUTING.md with detailed developer setup instructions, testing guidelines, and troubleshooting
• Added DEVELOPMENT.md as a quick-start guide for experienced developers
• Includes platform-specific commands, common development tasks, and structured workflow guidance

Changes Made

• CONTRIBUTING.md: Expanded from basic legal requirements to comprehensive developer guide with:

  • Detailed setup instructions for all supported Python versions
  • Platform-specific commands (macOS/Linux/Windows)
  • Testing workflows and debugging guidance
  • Code quality tools documentation
  • Project architecture explanation
  • Troubleshooting section with common issues

• DEVELOPMENT.md: New quick-start guide featuring:

  • TL;DR setup commands for experienced developers
  • Key commands reference
  • Project structure overview
  • Quick debugging tips
  • Essential workflow steps

Test Plan

• Validated all setup commands work correctly in virtual environment
• Verified documentation commands match CI configuration
• Confirmed all referenced files and paths exist
• Pre-commit hooks pass successfully

Benefits

• Reduces onboarding time for new contributors
• Provides clear guidance for both novice and experienced developers
• Includes troubleshooting for common development issues
• Documents project structure and conventions
• Makes the project more accessible to the open source community

🤖 Generated with Claude Code

[mxschmitt]

Looks auto-generated, I'll close it for now. The repository is fairy simple so AI should figure it out on the fly.