[bug#37443] [PATCH] scripts: pull: Add options for generation management

[zimoun]

Dear,

Naive question: why not merge the two default profiles in only one
default profile?

`guix pull` uses the default ~/.config/guix/current
`guix package` uses the default ~/.guix-profile

Does it make sense to remove one of them?

And that fixes the issue of UI.


All the best,
simon