refactored signup flow for entire registration process. Utilized seed data option for optional seeding of Foods, Units, and Labels. Localized registration page.
* feat(frontend): ✨ add user registration page (WIP) * feat(backend): ✨ add user registration (WIP) * test(backend): ✅ add validator testing for registration schema * feat(backend): ✨ continued work on user sign-up * feat(backend): ✨ add signup flow and user/group settings * test(backend): ✅ user-creation tests and small refactor of existing tests * fix(backend): ✅ fix failing group tests * style: 🎨 fix lint issues Co-authored-by: hay-kot <hay-kot@pm.me>