metagen: simplify catchall generations; move some codeview enums into metacode; generate enum->string code

src/codeview/codeview.c

@@ -1,6 +1,11 @@
 // Copyright (c) 2024 Epic Games Tools
 // Licensed under the MIT license (https://opensource.org/license/mit/)
 
+////////////////////////////////
+//~ Generated Code
+
+#include "generated/codeview.meta.c"
+
 ////////////////////////////////
 //~ CodeView Common Functions