i18n: add branch isolation translations for all 17 languages

Added branchIsolation section translations to settings.json for:
- Catalan (ca)
- German (de)
- Spanish (es)
- French (fr)
- Hindi (hi)
- Indonesian (id)
- Italian (it)
- Japanese (ja)
- Korean (ko)
- Dutch (nl)
- Polish (pl)
- Brazilian Portuguese (pt-BR)
- Russian (ru)
- Turkish (tr)
- Vietnamese (vi)
- Simplified Chinese (zh-CN)
- Traditional Chinese (zh-TW)

Translations include:
- enableLabel: Enable Branch Isolation
- enableDescription: Index each Git branch separately...
- storageWarning: Each branch will have its own index...

Author: yavpungggi