Moved more to Map library

Shared/Models/Stateless/Methods/IAge.cs

@@ -0,0 +1,9 @@
+namespace View_by_Distance.Shared.Models.Stateless.Methods;
+
+public interface IAge
+{ // ...
+
+    (int, TimeSpan) TestStatic_GetAge(DateTime minuend, DateTime subtrahend);
+    static (int, TimeSpan) GetAge(DateTime minuend, DateTime subtrahend) => Age.GetAge(minuend, subtrahend);
+
+}