Generate ".resi" file from ".res"?

I added this to the issue too, but I was able to create an elisp command that can do this using the rescript-lsp mode. I submitted a PR to the rescript emacs mode to ad this.

(defun lsp-rescript--create-interface-from-buffer (buffer)
  (interactive "bFile containing implementation: ")
  (with-current-buffer buffer
    (let ((uri (concat "file://localhost" (buffer-file-name) )))
      (if (lsp-request "textDocument/createInterface"
                       (list
                        :uri uri)
                       )
          (find-file (concat (buffer-file-name) "i" ))
        ())
      )))