HOLI-10925: add unsubscribe confirmation screen

apps/mobile/navigation/RootNavigator.tsx

apps/mobile/navigation/linkingConfig.ts

apps/mobile/navigation/routeName.ts

apps/web/pages/unsubscribe.tsx

core/i18n/locales/de.json

core/i18n/locales/en.json

core/screens/mail/Unsubscribe.tsx

core/screens/mail/Unsubscribe.web.tsx

core/screens/mail/components/EmailContent.tsx

core/screens/mail/components/EmailIllustration.tsx

core/screens/mail/hooks/useEmailSubscriptionAnimation.ts

core/screens/mail/mutations.tsx

core/screens/mail/utils/maskEmail.ts

.../ui/assets/img/illustrations/resubscribe_illustration.svg

.../ui/assets/img/illustrations/unsubscribe_illustration.svg