I disagree Zed is an IDE, it is quite far from InteliJ, Borland/Embarcadero, VS, XCode, Eclipse, Netbeans...
If it is about adding enough plugins until it eventually becomes one, then any programmer's editor is an IDE.
Try to use Zed to debug Go code.
https://microsoft.github.io/debug-adapter-protocol
Zed is the new emacs?
In Zed, you need to write a full blown plugin, and can change only what the Zed authors exposed through their plugin API.