[2915] Add script support for quest 660

Thanks to grz3s for providing the necessary data
[2916] Implement escort quests 1222 1270

Waypoints and texts are taken from ytdb. Thanks to them for initial problem research.
Note: Be sure to remove dbscripts_on_quest_start for these quests, otherwise you might get unexpected behaviour

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>