Forward schematic pin-label font size to Circuit JSON

[GokulPandi-M]

Summary

Carries the optional per-port schPinLabelFontSize prop into schematic_port.display_pin_label_font_size as a precise numeric Circuit JSON value.

Core resolves:

• "sm" to 0.12
• numeric distance inputs such as "0.1mm" (already normalized by props) to 0.1
• "default" and omitted values to undefined, preserving the existing context-sensitive renderer default

Dependencies

• Circuit JSON support: Add optional schematic pin-label font size circuit-json#723 (merged and released in circuit-json@0.0.476)
• Props contract: Add per-port schematic pin label font size props#810

Scope

This PR only resolves the props-level input and writes the precise optional value into Circuit JSON. Renderer support belongs in a separate circuit-to-svg PR.

Validation

• focused regression test passes
• full TypeScript check passes
• package build passes
• distribution smoke test passes
• changed files pass Biome formatting

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Project	Deployment	Actions	Updated (UTC)
tscircuit-core-benchmarks	Ready	Preview	Aug 25, 2026 9:58pm

[seveibar]

don't submit for review until CI passes!

[GokulPandi-M]

don't submit for review until CI passes!

yeap !! but this pr denpends on tscircuit/circuit-json#723 (so it is failing btw sorry for confusions)