Describe the problem you have/What new integration you would like

The MPR121 chip not only supports 12 channels of touch sensors: 8 of its pins can also be used as LED driver or GPIO pins.
The MPR121 EspHome component on the other hand only supports the touch binary sensors.

Please describe your use case for this integration and alternatives you've tried:

It would be awesome to be able to also use the pins as e.g. binary switch outputs, because the chip supports it.
Regarding alternatives, there aren't really any feasible alternatives because of the MPR121's rich feature set.
(and because I just bought like 30 of them for a project)

Additional context

edit: they can even do PWM, here's a datasheet going into detail regarding the Multifunction Pins: https://www.nxp.com/docs/en/application-note/AN3894.pdf
But it seems they can only PWM at 4bit (16 steps) resolution, support for this would probably be lower priority.