The corresponding c code for encoding and decoding them can be found in
wpa_supplicant/src/utils/common.c

printf_decode escapes a SSID for returning in scan results

wpa_config_parse_string reads a string from the config or the socket. It
might be nicer to use the printf encoded P"I \xf0\x9f\xa6\x80 rust"
style but I could not find a decent encoder.

Add helper methods for reading a line from the socket, and for sending a
request and waiting for the response.

It adds a debug log message if there is no listener for the boradcasts.

This is to allow the runner to keep going if there is an issue with any
single response from the wpa_supplicant

This replaces the INI config parser from the config crate with a
simplified parser that only support k=v pairs, but does proper printf
unsecaping for non printable/on ASCII characters.