Map Macau Traditional Chinese to Hong Kong locale

[Pigbibi]

Summary

• map Macau Traditional Chinese locale identifiers to the zh-HK option
• keep the Traditional Chinese language picker aligned as one Hong Kong/Macau option and one Taiwan option
• add coverage for zh-Hant-MO and zh-MO normalization

Validation

• git diff --check
• iOS unit tests not run locally because this Linux VPS does not provide xcodebuild

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Preserve explicit Hans in Macau locales

When iOS supplies a script-qualified simplified Macau locale such as zh-Hans-MO, this new segments.contains("mo") check runs before the existing script check, so normalizedIdentifier(from:) now returns zh-HK and the app loads Traditional Chinese despite the identifier explicitly requesting Hans. The change is intended for Macau Traditional Chinese, but this branch also captures Simplified Chinese Macau variants; handle hans before the Macau region fallback or special-case zh-Hans-MO as simplified.

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