Add formatting

[xarantolus]

This pull request adds formatting to the project, providing a consistent code formatting standard across the entire codebase. The Makefile target makes formatting very easy, just run make format before committing. It automates the formatting process, ensuring that all code adheres to a unified style, improving readability, simpliying code reviews, and reducing style-related discussions.

Advantages:

1. Consistency: Enforces a uniform code style throughout the project.
2. Efficiency: Automates code formatting, saving time during code reviews and reducing manual formatting efforts.
3. Collaboration: Eases collaboration by reducing the likelihood of merge conflicts due to formatting differences.
4. Maintenance: Simplifies long-term code maintenance by keeping the codebase clean and consistent