Translate Qt sessions to Jupyter sessions

[astrofrog]

Work in progress, seems to work for basic plot types but need to work on 3D viewers and WWT. Also need to decide on an API and a way to select which widgets to use (bqplot vs matplotlib, vispy vs ipyvolume)

[codecov]

Codecov Report

Attention: Patch coverage is 69.86301% with 22 lines in your changes missing coverage. Please review.

Project coverage is 85.84%. Comparing base (54499a8) to head (6c8ad30).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
glue_jupyter/session.py	36.84%	12 Missing ⚠️
glue_jupyter/app.py	62.50%	9 Missing ⚠️
glue_jupyter/tests/test_session.py	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #459      +/-   ##
==========================================
- Coverage   86.07%   85.84%   -0.24%     
==========================================
  Files          90       92       +2     
  Lines        5242     5312      +70     
==========================================
+ Hits         4512     4560      +48     
- Misses        730      752      +22     

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[astrofrog]

Note to self, if glue-jupyter is installed it will break session loading in glue-qt as the plugin will always apply the patches. I need to find a way of conditionally applying it just when loaded from Jupyter.