Add ap_info

[justmobilize]

This moves ssid, bssid and rssi to a new network class to match wifi.radio. Also added in authmode since the call was there, but not being used.

Also made firmware_version a string, since it always needs to be formated.

Once Approved, will open PRs examples in other libraries and guides.

[justmobilize]

@dhalbert would love your thoughts on this