[Better Errors] Connectivity tool suggestions & resolution

[Ecarrion]

NOTE Define error messages and share them with the other platform

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After the connectivity tool has finished running let's offer some suggestions to the user so they can continue their trouble shoot journey.

No Internet connection

• [ ] Tell them to check they have an active internet connection

Can't reach wpcom servers

• [ ] Show some sort of internal error message
• [ ] Show contact support button

Can't reach direct site

• [ ] Tell them to contact their host

Can't reach the site via the jetpack tunnel

• [ ] Offer jetpack troubleshoot guide
• [ ] Tell them to contact their host

[dangermattic]

🚫 Please add a type label (e.g. type: enhancement) and a feature label (e.g. feature: stats) to this issue.