feat: collections be damned

- Hooked up the rest of the half-implemented collection support,
  though it is 4am, so expect things to break. Good luck if you want
  to try it before I get to testing it tomorrow. 🫡

Shokofin/API/Info/ShowInfo.cs

@@ -37,6 +37,12 @@ public class ShowInfo
     public bool IsStandalone =>
         Shoko == null;
 
+    /// <summary>
+    /// Indicates that this show is consistent of only movies.
+    /// </summary>
+    public bool IsMovieCollection =>
+        IsStandalone && DefaultSeason.Type == SeriesType.Movie;
+
     /// <summary>
     /// The Shoko Group, if this is not a standalone show entry.
     /// </summary>