Add a linter

[sharmaadityaHQ]

Description

Added pre-commit framework to automate flake8 checks in development code. Also added the required documentation in README.md file.

Fixes #75

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 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

[sharmaadityaHQ]

Please have a look at this @botanicvelious .

[botanicvelious]

Should just update the requirements.txt rather then adding extra steps.

[sharmaadityaHQ]

I have made the required changes. Please have a look @botanicvelious.