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/my-game/example/stat.js

@@ -46,7 +46,7 @@ export class Stat {
         return true;
     }
     static getFullyQualifiedName() {
-        return 'MyGame.Example.Stat';
+        return 'MyGame_Example_Stat';
     }
     static startStat(builder) {
         builder.startObject(3);