Add .editorconfig file to normalize formatting

[doub1ejack]

Currently there is no formatting guidance on this project so our PRs see a whole lot of distracting whitespace changes. We've looked at using Prettier, but the implementation can vary between developers.

Let's try using the same .editorconfig that the GreenUp project uses (https://github.com/codeforbtv/green-up-app/blob/master/.editorconfig). Feel free to make any personal tweaks you prefer, or ask the #money-on-my-mind channel for their preferences.

Goals:

1. VS Code should be able to recognize the .editorconfig file and use it's formatting rules
2. Try to find a way to apply the .editorconfig rules recursively throughout the entire project

[pphelps28]

Made a bit of a mess with the pull request for this one, sorry. I found the proper plugin to implement the .editorconfig format moving forward, but still need to apply it recursively.