Add Vue/Vuetify 3 compatibility to Echo Vue helpers

[mariobuikhuizen]

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Description

This PR adds Vue/Vuetify 3 compatibility Echo Vue helpers.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.69%. Comparing base (a70a30b) to head (bae3932).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #72   +/-   ##
=======================================
  Coverage   97.69%   97.69%           
=======================================
  Files          28       28           
  Lines        4070     4071    +1     
=======================================
+ Hits         3976     3977    +1     
  Misses         94       94           

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[dhomeier]

LGTM, just a minor suggestion for better test coverage.
There is no direct test here for the different vuetify versions, so the compatibility will need to be tested downstream, right? I checked locally for your glue-jupyter branch with ipyvuetify 3 and main with 1.19; everything looks fine there.
Since main so far is still using 1.x, maybe the docstring update should also be amended to say "Vue[tify] 1-2" or "Vue <= 2"?

[dhomeier]

Thanks, looking good now!