Add --jlcpcb/--lcsc/--tscircuit flags to tsci import

[seveibar]

Motivation

• Allow users to filter the sources when running tsci import so they can target JLCPCB or the tscircuit registry explicitly.

Description

• Added --jlcpcb, --lcsc (alias), and --tscircuit options to the import command in cli/import/register.ts.
• Updated the import action signature to accept parsed opts and compute hasFilters, searchJlc, and searchTscircuit booleans.
• Conditionalized the registry and JLCPCB search calls to only run when their corresponding filters are active while preserving the previous default of searching both sources when no filters are provided.
• Kept the interactive selection and import/install flows unchanged, only feeding them results from the filtered searches.

Testing

• Ran typecheck with bunx tsc --noEmit and it succeeded.
• Ran the import test with bun test tests/cli/import/import.test.ts which reports the test as skipped (no failures).
• Ran formatting with bun run format which completed successfully.

---

Codex Task

[tscircuitbot]

---

Thank you for your contribution! 🎉

PR Rating: ⭐⭐⭐
Impact: Major

Track your contributions and see the leaderboard at: tscircuit Contribution Tracker

---