feat: update Python version to 3.9 and typehints

[HitaloM]

Description

This pull request updates the project's minimum Python version from 3.8 to 3.9, incorporating the latest Python type hints. And also updates the ruff pre-commit hook.

Type of change

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

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• My changes generate no new warnings
• New and existing unit tests pass locally with my changes

[usernein]

@HitaloM Looks great to me