Setup tests with NodeJS

[fryorcraken]

Testing with Karma takes time locally as it needs to bundle every time.

Having the option to use node would make the feedback loop shorter when developing.

[fryorcraken]

Not straightforward, would need to provide 2 bundles in the zerokit-wasm package.

[chair28980]

This work will be covered within the scop of the test-automation-rln work. Other portions of this work have been completed and critical coverage exists already in the rln work done previously in js-waku.