Update extension deps and UI test CI workflows

[mahendrapaipuri]

• Bump npm dependencies of extension and playwright tests
• Update playwright test specs and snapshots
• Fix update-snapshot CI workflow
• Add dependabot config to bump npm dependencies

@mwouts Most of the issues we faced on the playwright tests are due to not updating the npm dependencies. So, I added dependabot config to be able to bump dependencies automatically. We need to make sure that extension and test dependencies stay inline with JupyterLab. If the dependabot bumping fails for any dependency, tag me on the PR and I will look into it.

[github-actions]

Thank you for making this pull request.

Did you know? You can try it on Binder: or .

Also, the version of Jupytext developed in this PR can be installed with pip:

HATCH_BUILD_HOOKS_ENABLE=true pip install git+https://github.com/mahendrapaipuri/jupytext.git@update_extension

(this requires nodejs, see more at Developing Jupytext)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.97%. Comparing base (d0e5b7a) to head (bc727dc).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1300      +/-   ##
==========================================
- Coverage   97.02%   96.97%   -0.05%     
==========================================
  Files          29       29              
  Lines        4501     4501              
==========================================
- Hits         4367     4365       -2     
- Misses        134      136       +2     

Flag	Coverage Δ
external	75.03% <ø> (ø)
functional	88.35% <ø> (ø)
integration	77.27% <ø> (ø)
unit	66.45% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[mahendrapaipuri]

@mwouts The failing conda test is due to outdated JupyterLab (4.2.5) in the test environment. This happens due to usage of GH actions cache instead of using most recent JupyterLab in the tests. Maybe a solution is to upgrade JupyterLab before running tests?