Make btn_menu and btn_share alias for btn_start and btn_back

[TaylerUva]

Share and menu are the more common newer terms for start and back that better align with the controller iconography. We should create btn_menu and btn_share as alias for btn_start and btn_back and mark back/start as deprecated

SuperCORE/src/main/java/com/frcteam3255/joystick/SN_XboxController.java

Lines 22 to 23 in 6e2d777

	public Trigger btn_Start = new Trigger(super::getStartButton);
	public Trigger btn_Back = new Trigger(super::getBackButton);