Refactor player animation and collision based entrances

Scripts/Utility/child_node_appender.gd

@@ -0,0 +1,26 @@
+extends Node
+
+# child_node_appender.gd
+
+# All children of this node will be moved onto the node that is specified by
+# provided path relative to the parent of this node
+
+@export var relative_path: String
+
+func _ready() -> void:
+	var parent := get_parent()
+	
+	if parent == null:
+		push_error("Child Node Appender has no parent")
+		return
+	
+	var node := parent.get_node_or_null(relative_path)
+	
+	if node == null:
+		push_error("Provided path does not resolve to a node")
+		return
+	
+	var children := get_children()
+	for child in children:
+		remove_child(child)
+		node.add_child(child)