Improve clai's performance when disconnected form the internet.

[andrewcmhicks]

Feature description
When using clai with suboptimal or no internet, clai could auto-detect via ping 8.8.8.8 that the connectivity state is poor or dead, and not try to connect to the clai server and hang the terminal for 3 seconds. Instead, clai could log commands issued during the outage and send them over once connectivity is re-established.

Acceptance criteria

1. When internet access is disconnected, clai does not try to connect to the remote server.