build/release github workflow

[aymanoid]

Could you please implement a github workflow to build and release binaries for all 3 platforms. I'm a windows user, and it's really difficult to build it on my machine as pgrx isn't supported on windows, so I'd really appreciate a prebuilt binary. For now, I'll be using sqids-plpgsql, although I'm guessing it's slower due to the complied nature of this one.

[4kimov]

Good idea, but looks like a few blockers on this one (pgcentralfoundation/pgrx#1927). On pause for now.