Exercise icons on jq track

[glennj]

There will be 3 "new" concept exercises

• "shopping" can reuse icon for "documented-lasagna"
  • this is the 'basics' exercise for jq
• "grade-stats" can reuse icon for "sieve"
  • this learning exercise is about the reduce function
• "recursive-functions"
  • this is a learning exercise about, surprise, recursion
  • the exercise doesn't have a story: it's just about "implement a recursive function for x"
  • perhaps something like this:
    

[glennj]

Regular Chatbot issue #137 applies to jq as well.