rework media layout (#22)

* replace media items tables with card grids

* style cleanup

* add basic paging

* sort and page in the db

* optimize sql for movies

* support movie posters

* resize movie posters and store in cache with channel logos

* fix bug preventing folders with more than 50 chars as local media sources

* support tv posters

ErsatzTV.Infrastructure/Data/Configurations/MediaItemSummaryConfiguration.cs

@@ -0,0 +1,12 @@
+using ErsatzTV.Core.AggregateModels;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace ErsatzTV.Infrastructure.Data.Configurations
+{
+    public class MediaItemSummaryConfiguration : IEntityTypeConfiguration<MediaItemSummary>
+    {
+        public void Configure(EntityTypeBuilder<MediaItemSummary> builder) =>
+            builder.HasNoKey().ToView(null);
+    }
+}