i18n: translate huggingfaceApiKey settings strings in all locales

Fill the six settings.huggingfaceApiKey* placeholders left by the HF
access-token feature in all 9 locales, reusing each locale's existing
civitaiApiKey* status renderings; document the new terminology
(access token, gated repository) in the translation guidelines.

locales/ru.json

@@ -325,12 +325,12 @@
         "civitaiApiKeyConfigured": "Настроен",
         "civitaiApiKeyNotConfigured": "Не настроен",
         "civitaiApiKeySet": "Настроить",
-        "huggingfaceApiKey": "[TODO: Translate] Hugging Face Access Token",
-        "huggingfaceApiKeyPlaceholder": "[TODO: Translate] Enter your Hugging Face access token",
-        "huggingfaceApiKeyHelp": "[TODO: Translate] Required to download from gated or private Hugging Face repositories. Create a read-only token at huggingface.co/settings/tokens, and accept the repository's terms on its page first.",
-        "huggingfaceApiKeyConfigured": "[TODO: Translate] Configured",
-        "huggingfaceApiKeyNotConfigured": "[TODO: Translate] Not configured",
-        "huggingfaceApiKeySet": "[TODO: Translate] Set up",
+        "huggingfaceApiKey": "Токен доступа Hugging Face",
+        "huggingfaceApiKeyPlaceholder": "Введите ваш токен доступа Hugging Face",
+        "huggingfaceApiKeyHelp": "Требуется для загрузки из закрытых (gated) или приватных репозиториев Hugging Face. Создайте токен только для чтения на huggingface.co/settings/tokens и сначала примите условия репозитория на его странице.",
+        "huggingfaceApiKeyConfigured": "Настроен",
+        "huggingfaceApiKeyNotConfigured": "Не настроен",
+        "huggingfaceApiKeySet": "Настроить",
         "civitaiHost": {
             "label": "Хост CivitAI",
             "help": "Выберите, какой сайт CivitAI будет открываться при использовании ссылок «View on CivitAI».",