Error reporting

[liquidev]

It would be nice if nim.nvim could accurately report errors in files, on :w. The current best solution seems to be using a separate plug-in (ALE), but due to the fact it uses nim check this simple case fails:

# a.nim
proc thing() =
  echo "hi"
include sub

# sub.nim
thing()  # nim check reports error, but nim c -r a works fine

nim.nvim already leverages nimsuggest and handles the above case correctly, so it should be fairly straightforward to capture any reported errors and underline tokens where these errors appear. Possibly also show them on the commandline.