Decompile/port event_object_movement

ld_script.txt

@@ -93,6 +93,7 @@ SECTIONS {
         asm/field_camera.o(.text);
         src/field_door.o(.text);
         asm/field_player_avatar.o(.text);
+        src/event_object_movement.o(.text);
         asm/event_object_movement.o(.text);
         asm/field_ground_effect.o(.text);
         asm/event_object_80688E4.o(.text);