Localization support

[tsl0922]

Localization support was added to the latest main branch.

We support the following languages now:

• en-US: English (United States)
• zh-Hans: Chinese (Simplified)
• it-IT: Italian (Italy)

To add a new translation for your language, just create a new json file under resources/romfs/lang from resources/romfs/lang/en-US.json, and send a PR.

Note:

• use IETF language tag for language code
• non-English language should change "fallback": true to "fallback": false

[natural-harmonia-gropius]

建议命名格式换 zh-Hans，因为存在 zh-hk-en 这样的情况，同时也可以避免未来或许会加入 zh-tw 引发争议

[tsl0922]

已修改，不过这里只是个代码，不会对显示产生实际影响。

[bovirus]

@tsl0922

Please add in first post a note that for any additional language

"fallback": true,

present in english language should be

"fallback": false,

and for language code ID to check here

https://en.wikipedia.org/wiki/IETF_language_tag

[tsl0922]

done.

[bovirus]

@tsl0922

Could you please consider if your source code can do it to modify the source code to use external language file as text file?
Thnaks.

[tsl0922]

will do it (#41).