accept Footprinter strings for cadModel

[seveibar]

Summary

• define a non-empty cadModel string as a Footprinter model string
• document the model string as independent of the component's PCB footprint
• preserve object CAD models, React-element CAD models, and cadModel={null}
• add parser coverage for cadModel="soic8"

Contract

<chip
  name="U1"
  footprint="custom_board_footprint"
  cadModel="soic8"
/>

Here, "soic8" describes only the procedural CAD model. It does not select or depend on the component's PCB footprint.

Validation

• bun test — 389 passed, 0 failed
• bun run typecheck
• bun run build
• bun run format:check
• bun run check-circular-deps
• all required documentation generators

[tscircuitbot]

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Thank you for your contribution! 🎉

PR Rating: ⭐⭐
Impact: Minor

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