Improve CLI command error handling

[mcglincy]

EA bug bash: https://observablehq.com/@observablehq/ea-bug-bash

We need dramatically better error handling around CLI deploy errors. At a minimum, we should be catching all unexpected http status errors and showing a more readable/actionable error message to users. (and no stacktraces :P)

See https://oclif.io/.

[Fil]

related: #523

[mcglincy]

@mythmon - are you doing any of this work as part of the deploy+clack re-tooling you're doing? Or should I revisit this issue once your changes are in place?

[mythmon]

Let's re-evaluate this after my changes are in place.

[cinxmo]

We can have a series of pre-deploy checks on top of error handling. I can think of:

• authentication
• file size limits (I purposely tested deploying a ~100 mb file and ran into a 413 😅)