Minimize crossings when shifting overlapping traces

[garrettparker245-code]

Fixes #83.

Summary

• Evaluates both offset directions when separating overlapping trace islands.
• Chooses the candidate with the fewest resulting crossings against surrounding trace geometry.
• Adds a regression test for choosing the lower-crossing offset direction.
• Updates affected example snapshots.

Tests

• npx --cache .npm-cache bun test tests\solvers\TraceOverlapShiftSolver\TraceOverlapShiftSolver.test.ts
• npx --cache .npm-cache -p typescript@5.9.3 tsc --noEmit
• .\node_modules\.bin\biome format lib\solvers\TraceOverlapShiftSolver\TraceOverlapIssueSolver\TraceOverlapIssueSolver.ts tests\solvers\TraceOverlapShiftSolver\TraceOverlapShiftSolver.test.ts
• npx --cache .npm-cache bun test

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Project	Deployment	Actions	Updated (UTC)
schematic-trace-solver	Ready	Preview, Comment	May 20, 2026 1:25am