Release notes:
- [puzzles] Clock changes:
- Add frame rotations (`z` and `x2`).
- SVG includes 12 o'clock marks and a back side label.
- 3-pin, diagonal, and back moves:
| Type | Reference | F pins |B pins | Count |
|----------------|-----------|----------------------|----------|---------------------------|
| 0-pin | bb/bb | N/A | `B1+` | 1 |
| 1-pin | Fb/bb | `UL1+` (WCA) | `BDRw1+` | 2×4 |
| Adjacent 2-pin | FF/bb | `UL+` (WCA) | `BD1+` | 2×4 |
| Diagonal 2-pin | Fb/bF | `MUL1+` | `BMUR1+` | 2×4 |
| 3-pin | FF/Fb | `ULw1+` | `BDR1+` | 2×4 |
| 4-pin | FF/FF | `ALL1+` (WCA), `F1+` | N/A | 2 |
| Axis rotations | N/A | N/A | N/A | 3 (`x2`, `y2` (WCA), `z`) |
See https://github.com/cubing/cubing.js/issues/280 for more details.
