fix: include component geometry by default to avoid missing output

[xiuqiang1995]

Summary

Fixes missing component/rectangle geometry in default STEP conversion flow by enabling component inclusion by default.

Changes

• Change includeComponents default behavior in circuitJsonToStep:
  • from opt-in to default-on (options.includeComponents ?? true)
• Update site UI default:
  • "Include components" checkbox is checked by default
• Add regression test:
  • verifies component solids are present even when includeComponents is not explicitly passed
• Minor README usage note update

Why

Issue #6 reports missing rectangle-like resistor block geometry in output.
A key cause is default conversion excluding components unless explicitly enabled.
This patch makes default behavior safer/closer to user expectation.

Validation

Ran:

bun test test/repros/kicad-step/kicad-step.test.ts test/repros/repro02/repro02.test.ts

Result:

• 5 passed
• 0 failed

Fixes #6

[vercel]

@xiuqiang1995 is attempting to deploy a commit to the tscircuit Team on Vercel.

A member of the Team first needs to authorize it.

[MustafaMulla29]

Please read the issue description, what it says