Improve the command line experience

Given that command line `ghcide` is the easiest way to resolve support queries, we should seek to have that be a first-class experience. In particular:

* We should produce a super detailed log that we can suggest people upload, which contains absolutely all the information we need to diagnose what went wrong.
* The problems recorded in https://github.com/digital-asset/ghcide/blob/master/docs/Setup.md should be matched, probably with a regex, and remediation steps given.