feat(probeRunner): assert probes method in proberunner

[tchapacan]

// TODO: https://github.com/NodeSecure/js-x-ray/blob/master/src/ProbeRunner.js#L74

Assert probes method in probeRunner constructor

Purpose of this PR is to :

• assert that validateNode is a function or array of functions
• assert that main is a function
• add unittest

Note that i have used import assert from "node:assert"; in probeRunner class but same can be done using if conditional.
LMK if it seems ok and enough to cover this TODO in probeRunner class ? I can assert that name exist as well ?

If anyone want to participate/feedback/propose/improve solution don't hesitate!

[fraxken]

@allcontributors please add @tchapacan for code, test

[allcontributors]

@fraxken

I've put up a pull request to add @tchapacan! 🎉