Feature request: Display running status of `ob-jupyter`

When using ob-jupyter with :async, I find that quite often I get lost when I eval all blocks or blocks before point. When waiting for the async results, I usually do some other editing. But it's hard for me to check which block is running or whether it has finished.

I tried to use hooks like org-babel-after-execute-hook to start and stop a spinner to indicate the evaluation progress. But it failed in the :async mode.

I also tried to use a counter to advice jupyter-generate-request or jupyter-handle-execute-reply since I found that a reliable way to check whether a block has finished is in jupyter-handle-execute-reply as I noticed the message "Code block evaluation complete." was from there.

(cl-defmethod jupyter-handle-execute-reply :before ((_client jupyter-org-client)
                                                        (req jupyter-org-request)
                                                        status
                                                        _execution-count
                                                        _user-expressions
                                                        payload)
      (decf jupyter-org-bable-request-count)
      (if (= jupyter-org-bable-request-count 0)
          (jupyter-org-bable-reset-request-count)))

But it failed. jupyter-generate-request seems not the right place to start the counter. And I know very little about cl things or concepts (like cl-defmethod).

It will be really nice to have functions to

• go to current running block
• show running status in modeline
• display the number of pending requests and the total requests [3/11] of last evaluation request (like org-babel-execute-buffer, jupyter-org-execute-to-point) in modeline or somewhere
• stop all pending requests (jupyter-repl-interrupt-kernel seems only stop the current running one)

How do you think about it?

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By the way, thanks for the great package. I've been tried to get into org-babel in the last eight years. But failed even after I tried org-babel itself, ein, and ob-ipython and scimax, many times. I try emacs-jupyter started from this week and it is super robust and the experience is really great!