If I remember correctly, VS Code is the most popular editor so it makes sense to target that first.
I haven’t tried it myself recently but Motoko provides a language server that is compatible with editors that support the Language Server Protocol.
https://langserver.org isn’t the official site but I think it does a great job of explaining why LSP makes sense. It also lists language server implementations for different languages, and LSP clients for different editors.
It should be possible to find your editor near the bottom of that page and get it to talk to the Motoko language server.