Full and privileged xtb integration?

[matterhorn103]

@ghutchis

I’m happy to discuss how to integrate xtb into packaged builds like AppImage / Windows / Mac. The latter one will take a bit of work, but I have some ideas. I think that’s a better way to go vs. “Get xtb…” (And yes, having it fully integrated is better than as a plugin … just that the plugin is easier to finish.)

Given the concerns over the inflationary effects of Python on Avogadro’s footprint, I wonder if the fact that xtb + crest are 87 + 28 MiB (on my system) affects how keen you are to bundle them…