A CLI resistor tool

I was tired of plugging in resistor codes into various web page forms. I wanted to just type them, and I mainly wanted to re-remember how to build an Elixir escript, and then use IO.ANSI color codes to show the band colors in in the command line.

This uses Escript. After cloning this repo, use mix escript.build to build and then run with ./resistor like:

./resistor black red red gold

Eventually, I may need to add a flag to reverse the process. Input a value and return the color codes. But I probably need to clean up after the kids for now.