zf 0.9.0

This is a smaller release. The main goal of this is to have a stable version of zf that targets Zig 0.11.0. There are also improvements to support the new Zig package manager, refactorings, and small fixes.

I originally planned to include a UI preview feature in this release, but I ran into some issues with in release builds and I haven't had time to debug properly. So that will be postponed until the next release of zf. But a lot of refactoring and code to support a UI preview is already included in this release.

And although this news is months old, zf is now available in nix.

See the changelog for full details.