add git ignore

[jungxjung]

Description

I started a .gitignore to ignore pycache, if we need to ignore anything else in the future we can all do it here

Fixes #14

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules

[jungxjung]

Yo just one line! who wants to review it! it literally only takes a sec!

[jungxjung]

I found a website that can create gitignore files for us, so I used it...