Okay, so what kind of solution are you looking for here? VS Code uses a closed-source LSP server for its C# extension. Rider is it's own custom stuff, of course.
So...where does that leave the Zed team? If existing LSPs aren't good enough, that's not a Zed problem: they're building an editor, not LSPs for your favorite language.
I've used Asciidoctor as publishing tool chain. It compiles to epub, pdf. Very easy to configure CI using GH actions. Plugins are also available for vscode and intellij.
https://zed.dev/extensions/csharp