IDE issues with project structure

[milesfrain]

PureScript IDEs do not play nice with the cookbook directory structure.

The IDEs usually expect to find these in the root directory:

root
  output/
  packages.dhall
  spago.dhall

We still have a common output/ and packages.dhall in root, but use a separate spago.dhall for each recipe.

root
  output/
  packages.dhall
  recipes
    RecipeFoo
      spago.dhall
    RecipeBar
      spago.dhall

So if you open your editor at the root, you'll see errors about a missing spago.dhall.

One workaround is to change your development root (where you open your IDE from) to the directory of the recipe you are editing:

cd recipes/RecipeFoo
spago build
code .

This workaround has a few issues:

• output/ is duplicated in the recipe directory.
• Automatic page refresh (from make RecipeFoo-web) will not pick-up this local output/, since it relies on output/ at root.
  • You can get page refresh to work by running make RecipeFoo-build-watch in another terminal, which will also build changes into output/ at root. This is not ideal, because now we're duplicating effort by building into two output/ locations.

[milesfrain]

A follow-up task is to document our recommended workaround in Contributing.md. Will do that after #228.