package request: purescript & spago

[waynevanson]

Purescript is a functional language that transpiles to javascript: https://github.com/purescript/purescript
Spago is the recommended PureScript package manager and build tool powered by Dhall and package-sets: https://github.com/purescript/spago

These are usually installed via npm using npm install --global purescript spago, but it's not guarenteed to work because they need the Haskell toolchain stack. Both packages are written in Haskell.

Dependencies:

• Spago
  • stack
• Purescript
  • stack
  • spago
  • gcc
  • ncurses-libtinfo-libs
  • ncurses-libtinfo-devel ?

Any other dependencies were already installed on my system, so I'm unaware of any other required dependencies.

I will try to fulfill this.

[waynevanson]

half fixes with #24723