docs: mutation-testing

[ASuciuX]

Added mutation testing-related info:

• testing docs file
  • how to run mutation testing locally
• mutation testing check on the PR template
• contributing section for how mutation testing should be taken into account when contributing

[ASuciuX]

I'm working on fixing and optimizing the mutants. Additionally, I aim to streamline the debugging process for future issues, as the existing method is quite time-intensive.

I will update this afterwards with the specifics.

[wileyj]

I'm working on fixing and optimizing the mutants. Additionally, I aim to streamline the debugging process for future issues, as the existing method is quite time-intensive.

I will update this afterwards with the specifics.

understood! i'll remove my approval for now - can you convert this to draft since we're waiting on other work?

[ASuciuX]

understood! i'll remove my approval for now - can you convert this to draft since we're waiting on other work?

Yes, I'll convert it now.

[ASuciuX]

This is outdated atm, would prefer to open a new one when it will be the case.