esp32: Implement WLAN.status() return codes.
esp32: Implement WLAN.status() return codes.

Resolves #3913: missing esp32 status() implementation.

pfalcon/micropython,adafruit/circuitpython,adafruit/circuitpython,bvernoux/micropython,selste/micropython,adafruit/circuitpython,bvernoux/micropython,pfalcon/micropython,trezor/micropython,MrSurly/micropython,MrSurly/micropython,adafruit/circuitpython,trezor/micropython,tobbad/micropython,adafruit/circuitpython,henriknelson/micropython,pozetroninc/micropython,bvernoux/micropython,henriknelson/micropython,henriknelson/micropython,selste/micropython,kerneltask/micropython,trezor/micropython,adafruit/circuitpython,MrSurly/micropython,pfalcon/micropython,tobbad/micropython,selste/micropython,pramasoul/micropython,trezor/micropython,pfalcon/micropython,henriknelson/micropython,bvernoux/micropython,pramasoul/micropython,kerneltask/micropython,pramasoul/micropython,pozetroninc/micropython,henriknelson/micropython,kerneltask/micropython,kerneltask/micropython,selste/micropython,bvernoux/micropython,tobbad/micropython,MrSurly/micropython,pramasoul/micropython,MrSurly/micropython,pozetroninc/micropython,tobbad/micropython,kerneltask/micropython,pozetroninc/micropython,selste/micropython,pramasoul/micropython,trezor/micropython,pozetroninc/micropython,tobbad/micropython,pfalcon/micropython