Basic CI setup (bulds/tests/linters)

[LasTshaMAN]

Is your feature request related to a problem? Please describe.

I think it would be useful (especially in the long run) to have continious integration pipelines set up, to check that basic functionality builds, tests unit (and possibly other types of tests in the future) pass, linters are satisfied.

This should prevent obviously broken code to land into main/dev branches, and improve review process.

Describe the solution you'd like

Maybe look into how other Rust projects are doing it and try to come up with someting similar.
It doesn't need to be "state of the art", simple working solution would suffice for now (and can be replaced in the future with something else, once more requirements are available for CI).

Additional context

Discussed this briefly with @FloppyDisck, and will be looking into it soon.

[FloppyDisck]

Two good possible tests could be running ```make``` and running cargo tests inside a SN private chain on a docker container