Adding OpenWrt support for Xiaomi AX3600 (Part 1)

For Developers
4592 
root@OpenWrt:~# opkg find wpad
root@OpenWrt:~# opkg find *wpad*
root@OpenWrt:~#

Empty answer :sweat_smile:

Edit : I followed this guide ; Xiaomi AX3600 install guide
So i'm on
Firmware Version OpenWrt 19.07-SNAPSHOT r0+12028-cb17f7021d / LuCI Master (git-20.085.19816-df13074)