feat!: add explicit command to fix target health issues

[federicobozzini]

Changes

• added new fixCommand property to the output result of the health check. This property doesn't appear in plain output, only json.

[muchzill4]

There's a lot of duplication between Fix and FixCommand, can you think of a way where we could use FixCommand as the source of truth for the command, and Fix only for the meta text?

Something like (pseudo-template):

{{Issue}}
   {{Fix}}
   {{If FixCommand}}
     -> run `{{FixCommand}}`

[federicobozzini]

There's a lot of duplication between Fix and FixCommand, can you think of a way where we could use FixCommand as the source of truth for the command, and Fix only for the meta text?

This was also my first thought but:

• often fixes are more than just run '<fixCommand>'.
• some issues don't have a fixCommand associated, fix is just a generic suggestion.

I think this is one of those cases where removing dupilications makes things messier rather than cleaner.

[muchzill4]

Thanks for introducing the nilable Fix and tweaking descriptions all over the shop. This is going to be much better than what we had. 🦾

[muchzill4]

Needs marking as breaking change and LGTM. Nice work.