Create service to populate Imdb data collection within mongo

We can use this collection as an alternative source to lookup imdb ids, which would be executed before name_to_imdb is called in the consumer.

src/metadata/Features/DownloadImdbData/GetImdbDataRequest.cs

@@ -0,0 +1,3 @@
+namespace Metadata.Features.DownloadImdbData;
+
+public record GetImdbDataRequest;