ajout du camion #87

* changements des objectifs, donnent juste des graines, sprite moins gros et objectifs plus nombreux
* changement de la probabilité de mutation
* refactor du code terrain et planet

entities/interactables/truck/ladder/scripts/truck_ladder.gd

@@ -0,0 +1,22 @@
+extends Interactable
+class_name TruckLadder
+
+@export var truck_interior : TruckInterior
+@export var planet_camera : Camera
+
+func _ready():
+	truck_interior.player_exited.connect(_on_truck_interior_player_exited)
+
+func interact(p : Player):
+	truck_interior.add_entity(p)
+	p.global_position = truck_interior.spawn_position.global_position
+	truck_interior.camera.make_current()
+	planet_camera.following = null
+	return true
+
+
+func _on_truck_interior_player_exited(p):
+	planet.add_entity(p)
+	p.global_position = global_position
+	planet_camera.make_current()
+	planet_camera.following = p