Add deprecation and copper cut-fill metadata

[Sang-it]

Summary

• add a source deprecated-props warning schema and include it in source element unions and exports
• add tooling and copper cut-fill roles to PCB fabrication paths, including replacement-trace validation
• mark schematic component pin spacing as deprecated
• clean related imports and documentation, and add focused schema coverage

Validation

• bun test (276 passed)
• bunx tsc --noEmit
• bun run build
• bun run lint:zod
• bun run check-snake-case
• Biome format and lint on changed files