Add recomendations for meeting scheduler

Core/Calculation/TeamIdComparer.cs

@@ -0,0 +1,16 @@
+using Core.Entities;
+
+namespace Core.Calculation;
+
+public class TeamIdComparer : IEqualityComparer<Team>
+{
+    public bool Equals(Team? x, Team? y)
+    {
+        return x != null && y != null && x.Id == y.Id;
+    }
+
+    public int GetHashCode(Team obj)
+    {
+        return obj.Id.GetHashCode();
+    }
+}