Summary

Backport of #11071 to v10.

• Adds a new opt-in dedupePeers setting that reduces peer dependency duplication
• Uses version-only peer identifiers (name@version) instead of full dep paths when building peer suffixes
• Eliminates nested suffixes like (@emotion/react@11(react@18)) → (@emotion/react@11.0.0)
• Transitive peers are still tracked (per-project isolation preserved), just identified by version instead of full dep path

Closes #11070

Test plan

• Unit tests: version-only suffixes, transitive peers with version-only IDs, multi-project isolation (3 new tests in resolvePeers.ts)
• Integration tests: single project + workspace with different peer versions (2 new tests in peerDependencies.ts)
• All existing resolvePeers tests pass (14/14)