dynlevy fixes & updates

- Improved ease of using console-triggered debug event ````emf_dynlevy.22````
- Major code & minor code generation fixes
- Actually hooked ````emf_dynlevy.21```` to appropriate on_new_holder on_action, though it's unclear whether this event is needed in practice still

Still no support for the diplo-on_actions of a liege successfully offering vassalization (increasing the liege's realm_size and therefore potentially their dynlevy law) or for a liege granting independence to a vassal (same, but decreasing the realm_size of the liege).