add some default types to de-duplicate similar implmentations

Pilz.Net/Data/DataManagerEventArgs.cs

@@ -0,0 +1,8 @@
+namespace Pilz.Net.Data;
+
+public class DataManagerEventArgs(IDataManager manager) : EventArgs
+{
+    public IDataManager Manager { get; } = manager;
+}
+
+public delegate void DataManagerEventHandler(object sender, DataManagerEventArgs e);