Create Japanese translation based on English file

[jelveh]

We currently do not have a Japanese translation file for our project. We need to create a new Japanese translation file (ja.js) that includes all translations present in the English file (en.js).

Steps to resolve

1. Create a new file src/gui/src/i18n/translations/ja.js
2. Use the contents of src/gui/src/i18n/translations/en.js as a reference
3. For each translation key in en.js, create a corresponding Japanese translation in ja.js
4. Ensure all translations are accurate and culturally appropriate

Additional notes

• Please ensure that the translations maintain the intended meaning of the English text
• If certain terms or phrases don't have a direct Japanese equivalent, consider adding translator notes or using transliteration where appropriate
• Pay attention to any cultural nuances that may need to be adapted for Japanese-speaking users

Files to be created

• src/gui/src/i18n/translations/ja.js

Related files

• src/gui/src/i18n/translations/en.js (reference file)

Thank you for helping to create the Japanese localization for our project! This will greatly improve accessibility for Japanese-speaking users.

[jelveh]

closed via #574