Translate courtyard outlines when changing footprint origins

[pokemongo1027]

Changing a footprint origin moves its copper and silkscreen but leaves pcb_courtyard_outline vertices at their original coordinates. For example, fp().sot23().origin("pin1") places the right edge of pin 3 at x = 2.9375mm while the courtyard still ends at x = 2.05mm, leaving copper outside the clearance outline.

Translate courtyard outline vertices by the same offset as the rest of the footprint. Map them into a new array with copied points because several footprint generators reuse module-level courtyard constants. This preserves earlier results and prevents offsets from accumulating across repeated generation. Rectangular courtyards retain their existing translation behavior.

Validation

• Added regression cases for SOT-23 pin1 and bottomleft origins; both fail before the fix.
• Tests also cover repeated generation, unchanged centered output, and rectangular courtyards translated exactly once.
• Focused origin tests: 14 passed, 0 failed, 105 assertions.
• Four SVG snapshots checked visually.
• Package and TypeScript declaration build, formatting of changed source/tests, and diff checks passed.
• Full suite on Windows with Bun 1.4.2: 565 passed, 3 failed. The same failures occur on unchanged upstream d0d2ee19b261781af97d405400eb88402598ac92: smf, parity/sod523, and diode-kicad-parity/sod523 (561 passed).

Prepared with AI assistance, local regression testing and independent code review.