gd: added input addon

addons/guide/modifiers/guide_modifier.gd

@@ -0,0 +1,23 @@
+@tool
+@icon("res://addons/guide/modifiers/guide_modifier.svg")
+class_name GUIDEModifier
+extends Resource
+
+## Called when the modifier is started to be used by GUIDE. Can be used to perform
+## initializations.
+func _begin_usage() -> void :
+	pass
+	
+## Called, when the modifier is no longer used by GUIDE. Can be used to perform
+## cleanup.
+func _end_usage() -> void:
+	pass
+
+func _modify_input(input:Vector3, delta:float, value_type:GUIDEAction.GUIDEActionValueType) -> Vector3:
+	return input
+
+func _editor_name() -> String:
+	return ""
+
+func _editor_description() -> String:
+	return ""