feat(i18n): complete Ukrainian (uk) translations (#28440)

* feat(i18n): complete Ukrainian (uk) translations

* fix(i18n): restore missing placeholders in Ukrainian translations

Fix 6 placeholder issues identified by cubic:
- accept_our_license: fix malformed {{agree}} placeholder
- invalid_credential: restore {{appName}} placeholder
- invalid_event_name_variables: restore {{item}} placeholder
- signing_up_terms: restore {{appName}} placeholder
- entries_deleted_successfully: use {{count}} instead of ICU plural
- entries_deleted_with_errors: use {{success}}/{{failed}} instead of ICU plural

* Update packages/i18n/locales/uk/common.json

Co-authored-by: cubic-dev-ai[bot] <191113872+cubic-dev-ai[bot]@users.noreply.github.com>

* nits

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Co-authored-by: cubic-dev-ai[bot] <191113872+cubic-dev-ai[bot]@users.noreply.github.com>
Co-authored-by: Romit <romitgabani1.work@gmail.com>
Co-authored-by: Romit <85230081+romitg2@users.noreply.github.com>