Create persistence manager and connectors for chests and gates

Entities/Map Objects/Chests/Scripts/Bases/chest_base.gd

@@ -1,6 +1,7 @@
 extends StaticBody2D
 class_name BaseChest
 
+signal ChestOpened
 signal OpeningAnimationStarted
 
 @export var is_open := false
@@ -8,7 +9,12 @@ signal OpeningAnimationStarted
 # Public Methods
 func Open() -> void:
 	is_open = true
+	ChestOpened.emit()
 
 
 func OpenAlreadyOpened() -> void:
 	pass
+
+
+func SetOpenedFromLoad() -> void:
+	is_open = true