WIP fix(node): Fix assert implementation and enable assert test suite

[Soremwar]

Based on #695

[caspervonb]

We're adding tests for assert here but the actual assertions are based on testing/assert.ts behavior.

Do you plan on porting over over Node's current implementation from https://github.com/nodejs/node/blob/master/lib/assert.js here @Soremwar?

[Soremwar]

Superseded by #769 . Awesome work @kt3k

[kt3k]

@Soremwar Thank you for your initial work!