More datahandler stuff, removed SzOperationResult.cs and made a new SzResult.cs and changed Evaluator and DataHander to utilize it

SzCore/SzException.cs

@@ -0,0 +1,8 @@
+namespace SzCore;
+
+public class SzException : Exception
+{
+    public SzException() {}
+    public SzException(string message) : base (message) {}
+    public SzException(string message, Exception inner) : base(message, inner) {}
+}