Wrap types in namespace for --ts-flat-files and --gen-all (#7451)

* Wrap types in namespace for --ts-flat-files and --gen-all

* Fixes for escaping object types

* Added to generate_code

tests/union_vector/character.ts

@@ -47,4 +47,3 @@ export function unionListToCharacter(
     default: return null;
   }
 }
-

tests/union_vector/gadget.ts

@@ -34,4 +34,3 @@ export function unionListToGadget(
     default: return null;
   }
 }
-