Fix: Rename Generic.CL folder to flat structure, update csproj and references

Exceptions/NotFoundException.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Generic.Exceptions;
+    public class NotFoundException : Exception
+    {
+        public NotFoundException(string message, Exception innerException) : base(message, innerException)
+        {
+
+        }
+    }