FlxGamepadManager: Add FlxG.gamepads.acceptMode

[Geokureli]

• FlxGamepadManager: Adds acceptMode, options are:
  • BOTTOM: The bottom face button is ACCEPT and the right face button is CANCEL. This is common on western-style consoles, like XBox or American PS4/5
  • RIGHT: The right face button is ACCEPT and the bottom face button is CANCEL. This is common in Japanese PS4/5 consoles, and Nintendo consoles
  • USE_MAPPING: Behavies like BOTTOM for nearly all gamepads, but RIGHT for Nintendo Switch gamepads
• FlxGamepad: Adds getMappedInput, which returns the device and the device specific input id
  • Change all device specific input ids to enum abstracts over int (were classes)
  • Adds ids for analog stick digital directions
• FlxGamepadMapping: Added FlxTypedGamepadMapping<T> where T is the enum result of getRawID
  • All FlxGamepadMapping extending classes use a specific ID enum for T