Update Katas to Be Consistent with Style Guide

[bettinaheim]

trafficstars

It would be nice to update the Katas to follow the style guide and make use of the standard libraries.

[soma2000-lang]

@tcNickolas Please assign me this.I would like to work on it

[tcNickolas]

Hi @soma2000-lang, This issue is currently on hold. I update the code whenever I come across a glaring issue, but in general I'm waiting for the Q# formatter tool that will automate a lot of this work. Thank you for your interest!