Many languages are missing visual UI editor, and also a good GUI framework. Are there any plans to add support for other languages besides javascript/typescript? is it possible with community contributions? Like go, zig, C#, C++, etc... ?
Major constraints for a given language will be runtime size and browser viability — it's fine to use e.g. C# and the CLR when deploying a desktop or (arguably) a mobile app, but it's a showstopper to bundle a several-hundred-MB wasm runtime to ship a C# app to the web. Zig and C++ don't share this problem, and JS gets a freebie because the browser already includes the JS runtime.
Community contributions would be amazing in this regard. Likely our core team should ship JavaScript support first as a template, then Pax's language support should be roughly as extensible as e.g. Stripe's SDKs: https://github.com/stripe