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/monster.js

@@ -527,7 +527,7 @@ export class Monster {
         return true;
     }
     static getFullyQualifiedName() {
-        return 'MyGame.Example.Monster';
+        return 'MyGame_Example_Monster';
     }
     static startMonster(builder) {
         builder.startObject(54);