feat: import traditional runtime configs for v1.1.0

[MoorZhou]

Summary

• add explicit local-only pinset detect and pinset import migration commands
• discover supported traditional version files with repository boundaries and safety checks
• merge exact selections into schema-2 project state while preserving unrelated tools
• update tests, bilingual documentation, acceptance fixtures, release gates, and version metadata for 1.1.0

Validation

• cargo fmt --all -- --check
• cargo clippy --workspace --all-targets --all-features --locked -- -D warnings
• cargo test --workspace --all-features --locked
• Unix installer and uninstaller tests
• PowerShell uninstaller test
• Bash and PowerShell runtime acceptance script syntax checks
• version, shim dependency, and git diff --check verification