Adds 'arty notes' command to display project notes from arty.yml with beautiful markdown rendering. Features include:
- Reads 'notes' field from arty.yml
- Supports full markdown syntax (headers, bold, italic, code blocks, links, lists)
- Smart rendering fallbacks: glow → mdcat → python3 → plain text
- Beautiful terminal output with colors and formatting
- ANSI escape codes for syntax highlighting
- Horizontal separators for code blocks
Also renamed arty.sh to artifact_git_download.sh for better clarity.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
