feat(i18n): support translations for shelves titles and menu labels

[CarinaDraganJW]

Description

• PR proposal for implementing translations for shelves titles and menu labels

Steps completed:

According to our definition of done, I have completed the following steps:

• [ ] Acceptance criteria met
• [ ] Unit tests added
• [ ] Docs updated (including config and env variables)
• [ ] Translations added
• [ ] UX tested
• [ ] Browsers / platforms tested
• [ ] Rebased & ready to merge without conflicts
• [ ] Reviewed own code