Refactor event handling and improve argument validation across indicators

- Updated event handler signatures to use TValueEventArgs for consistency in Mama, Mgdi, Pwma, Rma, Sma, Ssf, Super, T3, Tema, Trima, Usf, Vidya, Wma, and Atr classes.
- Enhanced argument validation by specifying parameter names in exceptions for clarity.
- Adjusted tests to align with new event handler signatures.
- Improved code readability and maintainability by using structured records and lambda expressions.

lib/core/tseries/TSeries.Tests.cs

@@ -298,7 +298,7 @@ public class TSeriesTests
         {
             var series = new TSeries();
             TValue? received = null;
-            series.Pub += tv => received = tv;
+            series.Pub += (object? sender, TValueEventArgs args) => received = args.Value;
 
             series.Add(100, 42.0);
 
@@ -313,7 +313,7 @@ public class TSeriesTests
             var series = new TSeries();
             TValue? received = null;
             series.Add(100, 42.0);
-            series.Pub += tv => received = tv;
+            series.Pub += (object? sender, TValueEventArgs args) => received = args.Value;
 
             series.Add(100, 43.0, isNew: false);