FYI this exists now

Somewhat inspired by [this discourse post](https://discourse.julialang.org/t/where-is-julia-heading-lack-of-clarity-about-priorities-long-term-direction-and-governance/133734/34?u=cjdoris) (and the whole thread in general) I have started on a basic site for the JuliaPy org.

My plan is basically to have a front page explaining all the different repos, and in particular explaining that there are two ecosystems - the PythonCall one and the PyCall one - and which packages belong to which. And beyond that it's a place to make blog posts about big new features or things I'm planning to do or thinking about, in particular as I'm working towards PythonCall v1.

I won't have time to make it very snazzy, but I would encourage anyone else in the org to contribute to the site or make blog posts.

@ararslan @ihnorton @Keno @malmaud @StefanKarpinski @stevengj @tkf @ViralBShah - pinging org owners for visibility