Running OCaml Receipes in repl.it

[cuihtlauac]

An OCaml recipe depends on a set of libraries. In this task we want a recipe description to be automatically turned into a Replit environment. That would allow executing and testing the recipe. Replit may be a nice environment to run the recipes because it's using Nix instead of Opam to install dependencies, which allows a very fast set up.

• Manually create a couple of replits corresponding to existing recipes
• Extract the common set up
• Devise a way to generate the setup from the recipes data
• Optionally, tweak the recipes and tasks data in order to enable the previous task

P.S. Dependencies that includes PPX need to be taken into account with extra care.