Implemented VTEX own concept of event level

#9

Author: Caldas

src/SampleWebAPI/Logging/VTEXEventLevel.cs

@@ -0,0 +1,11 @@
+
+namespace VTEX.SampleWebAPI.Logging
+{
+    public enum VTEXEventLevel : int
+    {
+        Critical = 3,
+        Important = 2,
+        Default = 1,
+        Debug = 0,
+    }
+}