Using Astro Software on Apple Silicon (ARM Macs)

[jrcain-usgs]

When I had trouble installing Knoten, I was directed to ISIS Dev on the Mac M1 ARM System.

It was about a year out of date, and my PR #123 partially updates it, but I have some questions:

• Should go in a different direction with that doc (more general purpose, not ISIS-dev-specific)?
• Do we still recommend x86 over ARM?
• Have others had success Building ISIS (and other Astro software) on Native ARM?
• Is the Qt Apps not displaying issue still occurring?

The current setup detailed in that doc is not great, it involves installation and installation of conda in order to switch between x86 and ARM environments - lots of overhead work. I use (and recommend) something like this side-by-side setup from Adventures in Seq-Land instead.

ISIS can now build on native ARM, and Conda can find the dependencies, at least sometimes (although dependency errors seem to be more common on ARM than on x86). Other Astro software doesn't get along with ARM quite as well - Some info on could be needed just to get them installed for general use, not necessarily for development.