feat: simple failed request handling (#474)

When a movie or series is added with radarr or sonarr, if it fails, this changes the media state to
unknown and sends a notification to admins. Client side this will look like a failed state along
with a retry button that will delete the request and re-queue it.

src/i18n/locale/en.json

@@ -71,6 +71,7 @@
   "components.RequestCard.all": "All",
   "components.RequestCard.requestedby": "Requested by {username}",
   "components.RequestCard.seasons": "Seasons",
+  "components.RequestList.RequestItem.failedretry": "Something went wrong retrying the request",
   "components.RequestList.RequestItem.notavailable": "N/A",
   "components.RequestList.RequestItem.requestedby": "Requested by {username}",
   "components.RequestList.RequestItem.seasons": "Seasons",
@@ -376,11 +377,13 @@
   "i18n.declined": "Declined",
   "i18n.delete": "Delete",
   "i18n.deleting": "Deleting…",
+  "i18n.failed": "Failed",
   "i18n.movies": "Movies",
   "i18n.partiallyavailable": "Partially Available",
   "i18n.pending": "Pending",
   "i18n.processing": "Processing…",
   "i18n.requested": "Requested",
+  "i18n.retry": "Retry",
   "i18n.tvshows": "Series",
   "i18n.unavailable": "Unavailable",
   "pages.internalServerError": "{statusCode} - Internal Server Error",