- Add three bead shape options: diamond (default), circle, square
- Implement diamond shape as horizontally elongated rhombus (realistic)
- Add draw-bead function to handle all three shape types
- Update CLI with --bead-shape parameter
- Create circle-beads.yaml config for traditional round beads
Diamond shape is now the default as it more accurately represents
real soroban/abacus beads which are typically bi-conical or
rhombus-shaped when viewed from the side.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
Thomas Hallock