Update Russian translation (pluralizations) (#2565)

* Add Russian translation (ru)

* Fix a missing comma

* Fix the wording for better consistency

* Update Russian translation

* Arrange Russian setting alphabetically

* Fix syntax error

* Update Russian translation

* Fix formatting error

* Update Russian translation

* Update Russian translation

* Update ru.jsx

* Fix syntax error

* Remove two_factor_auth.warning (appears obsolete)

* Add missing strings in ru.yml

A lot of new strings translated, especially for the newly added admin section

* Fix translation consistency

* Update Russian translation

* Update Russian translation (pluralizations)

app/assets/javascripts/components/locales/ru.jsx

@@ -103,7 +103,7 @@ const ru = {
   "report.target": "Жалуемся на",
   "search.placeholder": "Поиск",
   "search.status_by": "Статус от {name}",
-  "search_results.total": "{count, number} {count, plural, one {result} other {results}}",
+  "search_results.total": "{count, number} {count, plural, one {результат} few {результата} many {результатов} other {результатов}}",
   "status.cannot_reblog": "Этот статус не может быть продвинут",
   "status.delete": "Удалить",
   "status.favourite": "Нравится",