Improve validate tab

[sckott]

Right now we print R list to the output. Do something better than that, maybe:

• Parse the R list and just print the error messages as html elements rather than an R list?
• Use sprocket to validate and use that output - not sure if it would be feasible to reuse the CLI output for a browser

[tefirman]

Just tried out Sprocket's check and lint functionalities; not gonna lie, pretty slick and a much nicer display... Just not sure how difficult it would be to incorporate into the codebase. Which repo actually performs this functionality with WOMtools? Is that proof-api?

[sckott]

it comes from the Cromwell API, not proof-api.

[sckott]

yeah investigating is a good label. need to poke around and see what the options are first, then can come back here and get feedback on what to go with