rework television media (#26)

* rework television media

* refactor poster saving

* television and movie views are working again

* remove dead code

* use paper styling for all cards

* add show poster, plot to seasons page

* remove missing shows; cleanup interfaces

* fix split show display (same show in different folders/sources)

* add placeholder "add to schedule" button

* no more duplicate television shows, even with the same show split across sources

* stop releasing CLI for now

* use season number as season placeholder

* add television shows to collections

* add television seasons to collections

* add television episodes to collections

* add movies to collections

* remove movies, shows, seasons, episodes from collections

* fix page width and menus

* fix buffer size defaults

* fix chronological episode ordering

* allow deleting media collections

* don't get stuck building a playout with an empty collection

* schedule editing and playouts work again

* minor cleanup

* remove dead code

* fix bugs with viewing movies as they are loading

* add scanner tests; support nested movie folders

* update collections docs

* rearrange order of schedule items

* add show and season to schedule

* delete schedules that use legacy collections, reset all posters

* move cleanup to new migration

* load fallback metadata when nfo fails; don't require metadata in ui

* update readme and screenshots

ErsatzTV/Pages/MediaSources.razor

@@ -1,13 +1,15 @@
 @page "/media/sources"
 
-<MudTabs Elevation="1">
-    <MudTabPanel Text="Local">
-        <LocalMediaSources></LocalMediaSources>
-    </MudTabPanel>
-    @* <MudTabPanel Text="Plex"> *@
-    @*     <PlexMediaSources></PlexMediaSources> *@
-    @* </MudTabPanel> *@
-</MudTabs>
+<MudContainer MaxWidth="MaxWidth.ExtraLarge">
+    <MudTabs Elevation="1">
+        <MudTabPanel Text="Local">
+            <LocalMediaSources></LocalMediaSources>
+        </MudTabPanel>
+        @* <MudTabPanel Text="Plex"> *@
+        @*     <PlexMediaSources></PlexMediaSources> *@
+        @* </MudTabPanel> *@
+    </MudTabs>
+</MudContainer>
 
 @code {