Add deterministic decoupling cap row layout

[dustinvali]

Summary

/claim #15

• add a dedicated fast path for partitionType === "decoupling_caps" in SingleInnerPartitionPackingSolver
• place decoupling-cap partitions as a deterministic centered row using natural chip ordering
• apply edge-to-edge spacing from decouplingCapsGap, falling back to chipGap, with rotation-aware width handling
• add focused solver coverage for ordering, centering, custom gap spacing, and fallback gap spacing
• add the current circuit-to-svg dependency explicitly so @tscircuit/schematic-viewer resolves the schematic simulation SVG export used by the existing test suite

Testing

• bun test tests/PackInnerPartitionsSolver/SingleInnerPartitionPackingSolver.test.ts
• bun test tests/IdentifyDecouplingCapsSolver/IdentifyDecouplingCapsSolver06.test.ts
• bun test
• bun run format:check
• bun run build

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