MacOS support

[szydlovsky]

Since we have iOS code running, having it work on MacOS shouldn't be too much of a hassle probably. Either way needs to be researched and checked out.
If anyone feels like they absolutely need the MacOS support, make sure to let us know somehow (either a thumbs up or some comment) - we'd love to hear about it.

[jmeistrich]

I would love macOS support. I'm building a Mac chat app and rich input is a high priority. So I'd be very happy to test pre-releases and whatever else I can do to help.

One potential blocker is that react-native-macos is still a bit buggy on new arch, but that should be fixed in its next release 0.81 within a couple weeks.