Rename and move type_id class out of the CTFReader class

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Add CTF Writer Python bindings

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Add a usage example for the CTF Writer Python bindings

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>