feat: unit testing using vitest

[ebalo55]

Is your feature request related to a problem? Please describe:
Unit testing nowdays is a must as allows to test the implementations before publishing to any environment. Currently in vitest it seems not to be possible to proceed to the testing due to jeep-sqlite dependencies

Describe the solution you'd like:
A clear way to proceed to unit testing with vitest or any other testing framework

Describe alternatives you've considered:
I've read whole docs there is no mention to testing, additionally trying to integrate unit testing via web-like methodologies seems not to work

Additional context: