feat: add pig-latin exercise

[vaeng]

No description provided.

[vaeng]

The exercises in config.json are out of order. They should be sorted by difficulty then alphabet, right?i

[ErikSchierboom]

The exercises in config.json are out of order. They should be sorted by difficulty then alphabet, right?i

🤷 It doesn't matter much really. Didnt' you have a script?

[vaeng]

The exercises in config.json are out of order. They should be sorted by difficulty then alphabet, right?

I sneaked it into this PR, I hope that's okay.

🤷 It doesn't matter much really. Didnt' you have a script?

Yes:

 jq '
  .exercises.practice |= (
    sort_by(.difficulty, .slug) 
    | ([.[] | select(.slug == "hello-world")] + [.[] | select(.slug != "hello-world")])
  )
' config.json > updated_config.json