Add a panel with more information

[jtpio]

It would be useful to be able to open a new panel with more stats, that could be put to the right of a notebook for example (or maybe the right area). With the following information:

• graphs with more data points on the cpu and memory usage
• detailed list of running kernels with their cpu and memory usage
• the possibility to shut down kernels via this panel, for example when one starts using too much memory

[jtpio]

Closing as this would have to be implemented in https://github.com/jupyter-server/jupyter-resource-usage.