feat: add day 6 python solution implementation

[JackW2000]

Pull Request Template

Description

Implement day 6 solution using Python

Fixes # (issue)

Type of Change

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

How Has This Been Tested?

Implemented test class within solution to validate.

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
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules

[arya2004]

lgtm!