emmet: Use `index.js` directly to launch language server (#36126)

This PR updates the Emmet extension to use the `index.js` file directly
to launch the language server.

This provides better cross-platform support, as we're not relying on
platform-specific `.bin` wrappers.

Release Notes:

- N/A
2da80e4641Marshall Bowers committed on 8/13/2025, 4:34:18 PM· committed by GitHubparentd9a94a5
1 file changedLine totals unavailable