Two simple Haskell set-ups based on stack, ghcid, and optionally ghcide

Linux and macOS

• One simple Haskell set-up based on ghcid
  provides a window which displays compiler errors or the results of evaluating your code every time you save it.
• One slightly fancier Haskell set-up based on ghcide and ghcid
  additionally underlines code that leads to compile time errors with red squiggles in real time, displays types on hovering, and lets you jump to definitions.

Windows

• One simple Haskell set-up based on ghcid
  provides a window which displays compiler errors or the results of evaluating your code every time you save it.
• One slightly fancier Haskell set-up based on ghcide and ghcid
  additionally underlines code that leads to compile time errors with red squiggles in real time, displays types on hovering, and lets you jump to definitions.