Support Jupyterlab>4

[oeway]

This PR is to support Jupyterlab>4.

Some notes on the implementation:
I had to create a complete new project using the template: https://github.com/jupyterlab/extension-template

After testing it locally, I cannot upload the package to pypi using twine, because the default build system for jupyterlab extension project is hatch and they recently bumped the default metadata version to 2.3, and that is not supported by twine (even though no error was printed about the unsupported metadata version), the error I got was:

ERROR    InvalidDistribution: Metadata is       
         missing required fields: Name, Version.
         Make sure the distribution includes the
         files where those fields are specified,
         and is using a supported               
         Metadata-Version: 1.0, 1.1, 1.2, 2.0,  
         2.1, 2.2. 

I spent hours to dig into the issue and finally identified that the issue was in the recent version of hatchling, this was the fix: hatchling>=1.5.0,<1.22.2.

Closes #4

[github-actions]

👈 Launch a Binder on branch imjoy-team/imjoy-jupyterlab-extension/jupyterlab-4