Add API to get status of Wi-Fi networks and to enable/disable them

One of the interesting functions is possibility to disable/enable Wi-Fi and Guest Wi-Fi directly from the display. Thus we need backend API for that. One API would be to verify status - whether it is enabled. I guess it is enabled if there is at least one wifi interface whose network is LAN that is up, similarly for guest Wi-Fi. Here the output of wifi status would be helpful.

Then we need a separate API call to enable/disable Wi-Fis. IMHO disable should disable all Wi-Fis whose network is lan/guest and enable should enable all configured ones that have a password setup.