* Initial work on boat piloting changes
- Changed: Boat script is now registered as the boat's control script
- Added: Boat piloting via mouse movement
- Added: boatRef.pilot member
- Added: boatRef.pilot([charRef]) method
* add first test
* Fix boat control script attach on scripted create
* move boat move packet warnings to suspicious acts
* set pilot now errors when mutli has no process
* Add test, testclient support for boat move packet
* Touchup pilot members and methods
- Change `pilot` method to `setpilot`. This standarizes it a bit with
the same naming convention of `npc.setmaster`.
- Fix return values in `pilot` member, returning `0` if no pilot.
* Refactor to put functionality inside UBoat
* Address Discord comments
- Remove SuspecisionActs for no boat process.
- Add `relative_direction` to boat move sysevent.
* destroy boatmount on chr death; more error checks
* Fix compilation after master merge
* Fix relative_direction calculation
* wip tests
* Fix boat tests
* Address review comments
- Initialize UBoat::mountpiece
* Add HSA check to boat.setpilot
* Reject movement if boat mountpiece equipped
* docs; test cleanup
* add test for blocked movement
* Address Discord review comments
- Add suspicious acts notice for client movement while piloting
- Return error on attempting to script move a char that is piloting a boat
* Fix compiler warning
