Move from Cargo Make to Just

[nuke-web3]

While cargo make is nice, seeing https://github.com/casey/just far more commonly, and TBH it's far more legible and succinct IMHO even though it is an DSL... Thus a move to a simpler make system should help contributors be able to clearly see what each task/job is doing and how to modify it very easily.

The migration should be rather trivial, just need to ensure the CI is updated. As a nice followup or in closing this, using the just file instead of CI being independent would make this repo more DRY too. see https://github.com/casey/just#github-actions