Make WiFi access point (AP) available via wifi module (outside _dev)

[jakeg]

Currently to use a wireless access point you can either do:

let { WiFi } = require('wifi')
let wifi = new WiFi()

wifi._dev.wifiApMode({ ssid: 'Pico', password: 'password' }, (err) => {
  if (err) console.error('err', err)
  console.log('access point running')
})

or:

let { PicoCYW43WIFI } = require('pico_cyw43')
let pico_cyw43 = new PicoCYW43WIFI()

pico_cyw43.wifiApMode({ ssid: 'Pico', password: 'password' }, (err) => {
  if (err) console.error('err', err)
  console.log('access point running')
})

... it would be better if you could put the wifiApMode() function directly in the wifi object, outside the _dev object for usage:

let { WiFi } = require('wifi')
let wifi = new WiFi()

wifi.wifiApMode({ ssid: 'Pico', password: 'password' }, (err) => {
  if (err) console.error('err', err)
  console.log('access point running')
})