Add basic git workflow

[arslanashraf7]

Currently, there is no workflow specified in this repository that could check code quality, formatting, tests, commitlint same as edX.

We can create the basic architecture of the workflow from https://github.com/edx/edx-cookiecutters and instead of applying that onto a single package, we can customize the workflow settings to work for the whole repository.

Acceptance Criteria:

• Add basic GitHub actions workflow file
• Add code quality e.g. pycode style, black etc
• Run tests in the workflow (pytest/tox)
• Add coverage Github Action
• Add commitlint just like edX