[FEATURE]: Hand off to Amethyst if package has un-resolveable depends

[SomethingGeneric]

Is your feature request related to a problem? Please describe.

Not current, but previously in the early days of crystal, builds would fail and go un-noticed because we were building AUR packages with AUR depends. If this is still the case, I'm none the wiser.

Describe the solution you'd like

As described, auto-pull aur depends if they exist, and fail hard if neither the repos nor AUR have the solution

Describe alternatives you've considered

n/a

Additional context

No response