There’s tons of extensions for Zed, but you’re asking for particular extension hooks that don’t exist yet.
I expect the reason they don’t is that Zed sandboxes extensions quite aggressively (they’re essentially WASM running under wasmtime), which is fantastic for both security and performance, and it means they don’t break when the app updates, but it also means that a bit more care needs to be put into designing extension points.
I’m sure it’ll come.
There can't be without those "particular" hooks. Editors with them have tons, Zed is limited to kilos