Check log codes better

[plocket]

Plan for https://github.com/SuffolkLITLab/ALKiln/blob/v5/tests/log_codes/check_codes.sh:

• For every log code, count how many times it appears in the codebase
• By default, expect one of each code
• That can be overridden somehow to allow 2, 3, n appearances of a log code
• Still have a similar kind of output, just to keep it clean

This is tricky to develop locally because bash is different in different OSs. GitHub uses ubuntu. This is an ubuntu environment on replit in which I am experimenting. That already has the current files in it. I'm not sure how to make a generic ubuntu environment there, but it did replicate GitHub behavior. Feel free to fork!