better error messages

[dmah42]

for errors that lead to actionable resolutions by the user, we should include a link to some documentation about the error (hosted on aurae.io?) and a link to file a new issue here in the repo.

i think we can get this pretty easily by extending the From<CellsServiceError> for Status response translation to include known docs and links to file a new issue using constant strings.

[future-highway]

Addressing this might be a good time to introduce the use of the Richer error model