Add deterministic decoupling cap row layout

[Dewaldnel11]

Summary

• add a dedicated fast path for decoupling_caps partitions in SingleInnerPartitionPackingSolver
• place decoupling capacitors in a deterministic, naturally sorted, centered row using decouplingCapsGap ?? chipGap
• preserve allowed rotations and normalize positive-voltage pins toward y+ when a 0/180 rotation choice is available
• add focused regression coverage for row placement, natural ordering, spacing, and rotation normalization

Verification

• npx --yes bun@latest test tests/PackInnerPartitionsSolver/SingleInnerPartitionPackingSolver.test.ts
• npx --yes bun@latest run build
• npx --yes bun@latest run format:check
• git diff --check

Note: npx --yes bun@latest test still has unrelated baseline failures in the JSX/circuit dependency path and a circuit-to-svg export mismatch; the new focused tests pass.

/claim #15

[vercel]

@Dewaldnel11 is attempting to deploy a commit to the tscircuit Team on Vercel.

A member of the Team first needs to authorize it.

[Dewaldnel11]

CI is now green on the latest commit (test, format-check, and type-check pass). The only remaining failing status is Vercel, which reports Authorization required to deploy; that needs approval from a tscircuit Vercel team member.

[Dewaldnel11]

Demo video for the decoupling-cap layout change:

https://raw.githubusercontent.com/Dewaldnel11/matchpack/demo-assets/demo/matchpack-83-decap-row-layout-demo.mp4

It shows the new deterministic cap-only row layout, natural chip ordering, centered placement, VDD/GND pin orientation behavior, and the passing verification coverage.

[Dewaldnel11]

Heads-up: the only remaining failing status is Vercel (Authorization required to deploy). If a tscircuit Vercel team member can authorize the deployment for this PR, all checks should be green.