squash a bunch of commits

Shogi.Contracts/Api/Queries/ReadAllSessionsResponse.cs

@@ -0,0 +1,10 @@
+using Shogi.Contracts.Types;
+using System.Collections.Generic;
+
+namespace Shogi.Contracts.Api;
+
+public class ReadAllSessionsResponse
+  {
+      public IList<SessionMetadata> PlayerHasJoinedSessions { get; set; }
+      public IList<SessionMetadata> AllOtherSessions { get; set; }
+  }