Use sheet-aware schematic placement analysis

[seveibar]

Summary

• update the schematic placement analyzer to its merged multi-sheet implementation
• add a CLI regression proving coincident components on separate sheets do not produce placement issues

Root cause

The CLI still bundled an analyzer revision from before schematic-sheet support was merged. That made tsci check schematic-placement compare components and net labels across separate sheet coordinate spaces.

Validation

• bun test tests/cli/check/check-schematic-placement.test.ts tests/cli/check/check-schematic-placement-multi-sheet.test.ts
• bun run format:check
• bunx tsc --noEmit