Bundle qrca in the live iso

Hello,

I have a very long, complicated wifi password and since the cachyOS installer needs an internet connection, it's a pain to type it in. I was using the workaround of connecting to my phone hotspot and installing qrca via pacman, but with the current live iso it fails to run, because the qt libraries are outdated.

Since you are using plasma as the live iso desktop anyway, please consider including qrca on the live iso. That way, I can just scan the QR code from the NetworkManager menu and connect to my wifi out of the box.