Ajout des mutations Sauveteuse, Adaptative et résistante, ajout des crédits du jeu et d'un splash screen (+ un peu de debug)

entities/plants/scripts/plant_mutation/adaptive_mutation.gd

@@ -0,0 +1,19 @@
+extends PlantMutation
+class_name AdaptiveMutation
+
+func get_icon() -> Texture:
+    return preload("res://common/icons/dna.svg")
+
+func get_mutation_id() -> String:
+    return "ADAPTIVE"
+
+func get_base_rarity() -> int:
+    return 0
+
+func get_mutation_description() -> String:
+    return tr("ADAPTIVE_EFFECT_TEXT").format({
+        "mutation_probability_boost": get_mutation_probability_boost(),
+    })
+
+func get_mutation_probability_boost()->float:
+    return level * 0.05