Report `RuntimeError: Aborted()` errors

[jtpio]

Problem

Running the following code snippet make the kernel crash:

import faulthandler
faulthandler._sigsegv()

But the kernel indicator still shows the loading icon, and there is not message reported in the log console

Proposed Solution

Report these errors as critical to the log console, so they show up in the UI.

Additional context

• JupyterLite 0.6.0b1
• jupyterlite/xeus: https://jupyterlite-xeus.readthedocs.io/en/latest/lite/lab/index.html