After the refactor #1356 the player can now aim with the joypad right stick. But the input hints in scene grappling_hook_start.tscn are misleading: is showing a d-pad, not the right stick graphic.

At first glance, the existing helper scripts interact_input.gd and gamepad_input.gd don't quite fit for this case, unless we add 4 TextureRect node using the same graphic. Because the right stick is for all four aim actions: aim_left, aim_right, aim_top and aim_bottom.

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