Add on_move Entity Event for Scarpet (#1096)

* Add ON_MOVE Entity Event for Scarpet

* Update src/main/java/carpet/script/EntityEventsGroup.java

* Add on_move to Entities.md

* Switch to ValueConversions

* Update docs/scarpet/api/Entities.md

Co-authored-by: gnembon <41132274+gnembon@users.noreply.github.com>

* Fix #1126

* undo last commit cause it was on the wrong branch

Co-authored-by: gnembon <41132274+gnembon@users.noreply.github.com>

docs/scarpet/api/Entities.md

@@ -858,6 +858,7 @@ defining the callback with `entity_event`.
 The following events can be handled by entities:
 
 *   `'on_tick'`: executes every tick right before the entity is ticked in the game. Required arguments: `entity`
+*   `'on_move'`: executes every time an entity changes position, invoked just after it has been moved to the new position. Required arguments: `entity, velocity, pos1, pos2`
 *   `'on_death'`: executes once when a living entity dies. Required arguments: `entity, reason`
 *   `'on_removed'`: execute once when an entity is removed. Required arguments: `entity`
 *   `'on_damaged'`: executed every time a living entity is about to receive damage.