Rename CLI options

[ElliottKasoar]

Currently CLI options use underscores to separate words, which differs from the default for click/typer option naming (see Parameters here) (and so also from janus currently), and more generally from GNU conventions.

We certainly want to be consistent with janus, and I think sticking to the standard would be the best approach.

Note: Using hyphens was an issue for reading the config for janus, but that's now fixed. A similar fix may be needed for reading aiida inputs, but anything passed to janus should be fine.

While changing option names, we may want to consider if we want to unify some of the shared options e.g. arch/architecture

Originally posted by @ElliottKasoar in #104 (comment)