feat: generate courtyardrect from pcb_courtyard_rect

[makaiachildress-web]

Summary

Adds support for converting pcb_courtyard_rect circuit JSON elements into TSX elements during footprint code generation. This completes the circuit-json-to-tscircuit part of the courtyard pipeline for KiCad-imported components.

/claim #1081

Changes

Feature: courtyard rect generation (lib/generate-footprint-tsx.tsx)

• Filters pcb_courtyard_rect elements from the input circuit JSON
• Generates TSX with pcbX, pcbY, width, height (via mmStr) and optional layer attribute
• Follows the same pattern as existing element generators (cutout, silkscreen, etc.)

Tests: test7-courtyard-rect.test.tsx (new)

• Test 1: courtyard rect with layer attribute - verifies correct coordinate and layer mapping
• Test 2: courtyard rect without layer - verifies layer attribute is omitted when not present
• Both use inline snapshot assertions

Fix: CI test timeout (test5, test6)

• Tests using runTscircuitCode were timing out at the default 5s in GitHub Actions
• Added 30s per-test timeout for affected tests

Test plan

• All 12 tests pass locally and in CI
• Format check passes
• Type check passes