gd,refacto: added state chart addon and namespace cleanup

addons/godot_state_charts/any_of_guard.gd

@@ -0,0 +1,21 @@
+@tool
+@icon("any_of_guard.svg")
+
+## A composite guard, that is satisfied if any of the guards are satisfied.
+class_name AnyOfGuard
+extends Guard
+
+## The guards  of which at least one must be satisfied. If empty, this guard is not satisfied.
+@export var guards: Array[Guard] = []
+
+func is_satisfied(context_transition:Transition, context_state:StateChartState) -> bool:
+	for guard in guards:
+		if guard.is_satisfied(context_transition, context_state):
+			return true
+	return false
+
+func get_supported_trigger_types() -> int:
+	var supported_trigger_types:int = StateChart.TriggerType.NONE
+	for guard in guards:
+		supported_trigger_types |= guard.get_supported_trigger_types()
+	return supported_trigger_types