Add lever and jump pad components with activation logic

addons/rmsmartshape/actions/action.gd

@@ -0,0 +1,23 @@
+class_name SS2D_Action
+extends RefCounted
+
+## Base class for all plugin actions.
+##
+## UndoRedo system will call [method do] and [method undo].
+
+# @virtual
+## Returns string to be used as a name in editor History tab.
+func get_name() -> String:
+	return "UntitledAction"
+
+
+# @virtual
+## Do action here.
+func do() -> void:
+	pass
+
+
+# @virtual
+## Undo action here.
+func undo() -> void:
+	pass