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/flatc/foo.fbs

@@ -1,7 +1,9 @@
 include "bar/bar.fbs";
+include "bar/bar_with_ns.fbs";
 
 table Foo {
   bar:Bar;
+  bar2:bar.Bar;
 }
 
 root_type Foo;