chore: use setUpEditorWithSelection in all tests

[sehyod]

We had to skip a failing test in a previous PR (#215). Debugging the issue was difficult because the test was not using the util function setUpEditorWithSelection.

This PR adds the function to all the existing tests, to make the tests more legible

[codecov]

Codecov Report

Merging #220 (256a2f0) into main (b70068c) will increase coverage by 0.13%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #220      +/-   ##
==========================================
+ Coverage   72.18%   72.31%   +0.13%     
==========================================
  Files         103      103              
  Lines        5069     5064       -5     
  Branches      405      407       +2     
==========================================
+ Hits         3659     3662       +3     
+ Misses       1392     1384       -8     
  Partials       18       18              

Impacted Files	Coverage Δ
...textEditor/components/tipTapNodes/test-fixtures.ts	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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