feat(i18n): add license and content usage filter labels

Add new translation keys for model filter interface:
- license
- noCreditRequired
- allowSellingGeneratedContent

These labels support new filtering options for model licensing and content usage permissions, enabling users to filter models based on their license requirements and commercial usage rights.

locales/ru.json

@@ -188,6 +188,9 @@
             "title": "Фильтр моделей",
             "baseModel": "Базовая модель",
             "modelTags": "Теги (Топ 20)",
+            "license": "Лицензия",
+            "noCreditRequired": "Без указания авторства",
+            "allowSellingGeneratedContent": "Продажа разрешена",
             "clearAll": "Очистить все фильтры"
         },
         "theme": {