Installer Improvement: Give more helpful message when it fails due to not being connected to ethernet

[Pol-Lanski]

Based on this conversation: https://discord.com/channels/747647430450741309/747816600077598730/1108546217136365599

Users sometimes don't know that the machine needs to be plugged to the router via ethernet, and they get this error.

I don't know if there are more causes why they would get this error, but maybe we could spit out the error and end with a helpful sentence: Failed with exit code 1. Are you connected to the router via Ethernet? or something like that

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions!

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions!