Add GitHub Actions workflow for PEP8 style checking

[diwash007]

Description

Add GitHub Actions workflow for PEP8 style checking

Type of change

• New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the style guidelines of this project
• I have not added a commit to any .db files as part of my pull request
• I have performed a self-review of my own code
• I have commented on my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules