feat(localization): complete Workshop locale coverage

[e54-bot]

Summary

• extend the canonical catalog and generated settings projection to the pinned 15-locale OverPy 9.7.10 set
• preserve strict provenance, exclusions, fallback reporting, and real-project round trips
• support localized Unicode syntax and primary-locale-aware detection

Verification

• cargo clippy --workspace --all-targets -- -D warnings
• cargo test --workspace --all-targets
• workshop-catalog-gen check
• independent ablation: removing the fr-FR setGlobalVariable mapping makes the all-locale conversion regression fail

Refs #237

[Teakowa]

Blocking: Fixes #237 would auto-close #237 when this PR merges, but #237's acceptance criteria require a released workshop-rs version exposing the completed locale contract. Keep #237 open (for example, use Refs #237) until that release exists.