Update syntax generator to correctly write enums

Previously we would read/write enums as objects.  Now we correctly write them out as integers

src/Tools/Source/CompilerGeneratorTools/Source/VisualBasicSyntaxGenerator/GreenNodes/GreenNodeWriter.vb

@@ -442,6 +442,8 @@ Friend Class GreenNodeWriter
         Select Case type
             Case "Integer"
                 Return "ReadInt32"
+            Case "SyntaxKind"
+                Return "ReadInt32"
             Case "Boolean"
                 Return "ReadBoolean"
             Case Else
@@ -453,6 +455,8 @@ Friend Class GreenNodeWriter
         Select Case type
             Case "Integer"
                 Return "WriteInt32"
+            Case "SyntaxKind"
+                Return "WriteInt32"
             Case "Boolean"
                 Return "WriteBoolean"
             Case Else