CI, linter, unit tests

[QuantumChemist]

shall I (more or less because it gives me a lot of joy) set up an CI with linter and unit tests? 😃
It will also help keeping the game a bit more bug free.

[elijahducote]

Since the project files are up. Go right ahead!
You know better than I in regards to this.

[QuantumChemist]

Okidoki. Setting everything up might take one or two days and I have the most free time on weekends.