chore: implement pr template

[Pankeking]

chore - implement pr template

Solves #15

Description

Implementation of a pull request template that prepopulates the markdown text with guidelines and instructions for a clear PR.

Testing

I implemented the template on my own fork and made a new pr. It worked as intended.

Screenshots/Demo (optional)

Breaking Changes (optional)

Checklist

• [ ] I have added unit tests for my changes. (If applicable)
• [x] I have manually tested the changes and verified they work as expected.
• [x] I have followed the coding style guide.
• [x] I have updated the documentation to reflect the changes, including any breaking changes.
• [ ] I have created regression tests for the feature I am adding.

Reviewer Checklist

• [ ] Automated test coverage is satisfactory. (If applicable)
• [ ] PR is fully functional.
• [ ] PR regressions tested.
• [ ] Documentation regarding the PR has been properly updated.