[BUG] - matplotlib widget doesn't work in notebook - model not found

OS system and architecture in which you are running Nebari

GCP K8s cluster

Expected behavior

%matplotlib widget
import matplotlib.pyplot as plt

plt.plot([1,2,3], [1,2,3])
plt.show()

the above should show a plot.

Actual behavior

get an error:

Error displaying widget: model not found

How to Reproduce the problem?

1. add ipympl package to the default dashboard conda environment

2. run the following in a notebook using the default dashboard conda environment:

   %matplotlib widget
   import matplotlib.pyplot as plt
   
   plt.plot([1,2,3], [1,2,3])
   plt.show()
   

Command output

%matplotlib widget
import matplotlib.pyplot as plt

plt.plot([1,2,3], [1,2,3])
plt.show()

### Versions and dependencies used.

- needed to install `ipympl` first in the `dashboard` conda environment

### Compute environment

GCP

### Integrations

conda-store

### Anything else?

_No response_

[iameskild]

I added ipympl to the base nebari-jupyterlab image and successfully test it locally. This also didn’t require pinning the jupyterlab version 💪

Here is a PR for to get this working: https://github.com/nebari-dev/nebari-docker-images/pull/39

[iameskild]

@dharhas I was in agreement 😃