feat: New streamlined exit item (#455)

Co-authored-by: Dennis Ploeger <develop@dieploegers.de>

addons/escoria-core/game/core-scripts/esc_exit.gd

@@ -0,0 +1,43 @@
+# An item that streamlines exiting scenes
+extends ESCItem
+class_name ESCExit, "res://addons/escoria-core/design/esc_exit.svg"
+
+
+# Path to the target scene to change to
+export(String, FILE, "*.tscn") var target_scene = ""
+
+# Sound effect to play when changing the scene
+export(String, FILE, "*.ogg,*.mp3,*.wav") var switch_sound = ""
+
+
+func _enter_tree():
+	is_exit = true
+	player_orients_on_arrival = false
+
+
+func _ready():
+	call_deferred("_register_event")
+
+
+# Registers the exit_scene event based on the properties
+func _register_event():
+	if escoria.object_manager.has(self.global_id) and\
+			not "exit_scene" in escoria.object_manager.get_object(
+				self.global_id
+			).events:
+		var exit_scene_event_script = [
+			":exit_scene",
+		]
+		
+		if switch_sound != "":
+			exit_scene_event_script.append(
+				"play_snd %s" % switch_sound
+			)
+		
+		exit_scene_event_script.append("change_scene %s" % target_scene)
+		
+		var exit_scene_event = escoria.esc_compiler.compile(
+			exit_scene_event_script
+		).events["exit_scene"]
+		escoria.object_manager.get_object(self.global_id)\
+				.events["exit_scene"] = exit_scene_event