[WIP] module_deps

I wrote a script that creates a similar graph to app_deps, but does it at a module level. I already have some comments, like using xref instead of grep and intend to try that at some point. Right now it isn't 100% accurate, because it does not ignore calls inside of strings, and doesn't recognize modules with ' around the names, and does not appropriately interpret macros, and doesn't recognize 'io   : format("this")' as a call to io because of spacing.

Let me know what you think, and suggestions that you have.