Use iwd instead of wpa-supplicant for CLI WiFi control

If you want to interactively scan for and join wireless networks on Linux, you should install iwd instead of wpa-supplicant. Then you can use iwctl, with the following commands:

• device list
• station <device> scan to scan for networks
• station <device> get-networks to view the list of networks
• station <device> connect <ssid> to join a network
• station <device> connect-hidden <ssid> to join a hidden network

This is handy on old laptops that can't run modern desktops (e.g. netbooks).