Stdlib: Map

[ahdinosaur]

Describe the solution you'd like

Example:

let
  pkgs:
    - "zsh"
    - "vim"
in
  map
    list: pkgs
    each: (pkg) =>
      command: "apt install ${pkg}" 

TODO Checklist

• Add to rimu-parse
  • Add unit test(s)
• Add to rimu-eval
  • Add unit test(s)
• Add spec tests
  • Use related JSON-e spec tests to start
• Add to examples
  • Add example to playground
• Add to docs
  • Check complete on roadmap

Describe alternatives you've considered

• JSON-e map: https://json-e.js.org/operators.html#map

Additional context