Feature: Display GHC's errors/warnings by using Helm
Run all scenarios on project root directory
Open Haskell soruce code for test
ert-runner: Load target elisp file
Collect error/warnings from ghc-modi process buffer
Add helm-ghc-errors/warnings-source
Set candidates to helm-ghc-errors/warnings-source
Add helm-ghc-display-errors/warnings
Add helm-ghc--errors/wanrings-transformer
Set candidates-transformer to helm-ghc-errors/warnings-source
Dispaly candidates as multiline items