feat(locale): define GameDataLocale baseline and fixed data.bin loading

[KZdavid]

Summary

• Introduce a minimal GameDataLocale baseline type for game-data language selection
• Move game-data locale rationale into index.ts
• Keep database loading fixed to ./data/data.bin
• Remove locale-based database file selection logic

Notes

• This is the base PR for the locale stack.

[KZdavid]

Quick clarification for this PR:

• I noticed gameDataLocale is currently hardcoded to zh-CN, but it should default to en.
• I also have a Chinese data export available for testing for GTNH 2.8.4 and can share it for validation: data.bin.zip
• I’m preparing to upload my generated data.bin as a test artifact to help reproduce results.

[ShadowTheAge]

I am not currently adding things related to locale, only adding things related to removing hardcoded English texts as a groundwork for future locale packs.

[KZdavid]

I am not currently adding things related to locale, only adding things related to removing hardcoded English texts as a groundwork for future locale packs.

OK, I know. That way I will just pr #115 and I will remove the dependency on this pr