Py-github-helper

added `get_files_changed_during_pr` function

**Goal:**
Cleaner `README.md` with badges to highlight repo details

**Goal:**
Clean up any bugs when importing pypi package:

from py_github_helper.utils.commands import (
get_files_changed_during_pr,
add_comment
)

Fixes issue with `init.py` when running `from py_github_helper.commands import add_comment`

Update `PyPi` Package's `setup.py` to reference `py_github_helper` (snake_case) rather than `kebab-case`

Users can now use the tool in two ways:
- Pass input args via command line (in bash scripts)
- Import functions and invoke directly (in python scripts)