fix: use trame backend for stpyvista

[jacanchaplais]

Relevant issue or PR

Cherry-picked from #9.

Description of changes

Switches the backend for PyVista to trame instead of panel. This was necessary as panel appears to render the visualisations zoomed in, and would break depending on which form of interaction (panning, zooming, rotating) first occurred on the visualisation. The trame backend does not have these issues.

This should be merged after #13.

Testing done

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.78%. Comparing base (b7cfedd) to head (6133d51).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #14   +/-   ##
=======================================
  Coverage   95.78%   95.78%           
=======================================
  Files           3        3           
  Lines         190      190           
  Branches       22       22           
=======================================
  Hits          182      182           
  Misses          5        5           
  Partials        3        3           

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[dionhaefner]

Are those changes related to the trame backend?

[jacanchaplais]

No, but they got merged in from the cherry pick on #9. That's why this should be merged after #13. (it will be in the history of main after #13 is merged)

[jacanchaplais]

Going to remove the accidental pollution from #13. Closing.