Add audience categorization for shows: implement ShowAudience type, update related API endpoints, and enhance frontend components for audience selection and display. Modify data structures to support audience information in show creation and retrieval processes.

backend/src/TeleWave.Application/Library/GetShow/GetShowQueryHandler.cs

@@ -61,6 +61,7 @@ public sealed class GetShowQueryHandler(IAppDbContext dbContext)
                 show.Name,
                 show.OriginalName,
                 show.Kind,
+                show.Audience,
                 show.Description,
                 show.MetadataProvider,
                 show.MetadataExternalId,