add actors to movies and shows (#172)

* add actor metadata

* show actors in ui

* get full movie/show metadata from plex

* store actor thumbnail url

* rework movie detail page

* metadata fixes

* rework show detail page

* rework artist page

* code cleanup

ErsatzTV.Core/Interfaces/Plex/IPlexMovieLibraryScanner.cs

@@ -10,6 +10,6 @@ namespace ErsatzTV.Core.Interfaces.Plex
         Task<Either<BaseError, Unit>> ScanLibrary(
             PlexConnection connection,
             PlexServerAuthToken token,
-            PlexLibrary plexMediaSourceLibrary);
+            PlexLibrary library);
     }
 }

ErsatzTV.Core/Interfaces/Plex/IPlexServerApiClient.cs

@@ -34,6 +34,18 @@ namespace ErsatzTV.Core.Interfaces.Plex
             PlexConnection connection,
             PlexServerAuthToken token);
 
+        Task<Either<BaseError, MovieMetadata>> GetMovieMetadata(
+            PlexLibrary library,
+            string key,
+            PlexConnection connection,
+            PlexServerAuthToken token);
+
+        Task<Either<BaseError, ShowMetadata>> GetShowMetadata(
+            PlexLibrary library,
+            string key,
+            PlexConnection connection,
+            PlexServerAuthToken token);
+
         Task<Either<BaseError, MediaVersion>> GetStatistics(
             string key,
             PlexConnection connection,

ErsatzTV.Core/Interfaces/Plex/IPlexTelevisionLibraryScanner.cs

@@ -10,6 +10,6 @@ namespace ErsatzTV.Core.Interfaces.Plex
         Task<Either<BaseError, Unit>> ScanLibrary(
             PlexConnection connection,
             PlexServerAuthToken token,
-            PlexLibrary plexMediaSourceLibrary);
+            PlexLibrary library);
     }
 }