Simultanious AP and WiFi client mode

[maxpavlov]

It would have been perfect that for the cases where hardware allows it, rogueportal would work as AP and Wifi client simultaneously.

This repo talks about such a possibility on Raspberry Pi 3+ but with the use of hostapd which rogueportal ommits from using which I think is great.

Anyways, if you ever wonder what challenge to solve next - retaining wifi connection while "up"in the AP would be a sweet addition to the tool.

[rnsi]

Maybe an option to use a USB WiFi for the AP and leave the built-in WiFi for client mode? This might be better since the built-in WiFi range isn't great anyway.

[alxfu]

I mostly use the tool on the zero Ws and adding usb wifi would be unwise in terms of power draw and more. The usb OTG using a standard usb 2.0 is gold so far.