C#: Add QlDoc to the Generated file.

Author: michaelnebel

csharp/ql/lib/semmle/code/csharp/frameworks/Generated.qll

@@ -1,3 +1,9 @@
+/**
+ * A module importing all generated Models as Data models.
+ */
+
+import csharp
+
 private module GeneratedFrameworks {
   private import generated.dotnet.Runtime
 }