gd: added input addon

guide_examples/2d_axis_mapping/player.gd

@@ -0,0 +1,10 @@
+## A very simple player script for a player who can only move.
+extends Node2D
+
+@export var speed:float = 300
+@export var move_action:GUIDEAction
+
+func _process(delta:float) -> void:
+	# GUIDE already gives us a full 2D axis. We don't need to build it
+	# ourselves using Input.get_vector.
+	position += move_action.value_axis_2d.normalized() * speed * delta