fix(tvdb): respect display language when fetching metadata (#1889)

* fix(tvdb): respect display language when fetching metadata

* refactor(tvdb): use seasons translation

* refactor(tvdb): limit while loop

* fix(tvdb): fix translation with '-'

* refactor(tvdb): remove logs

* style(tvdb): remove useless logs

* refactor(tvdb): simplify wanted translation condition

* refactor(languages): move AvailableLocale  from context to types

server/routes/tv.ts

@@ -80,6 +80,7 @@ tvRoutes.get('/:id/season/:seasonNumber', async (req, res, next) => {
     const season = await metadataProvider.getTvSeason({
       tvId: Number(req.params.id),
       seasonNumber: Number(req.params.seasonNumber),
+      language: (req.query.language as string) ?? req.locale,
     });
 
     return res.status(200).json(mapSeasonWithEpisodes(season));