Display the errors raised by 'quarto'

[mwouts]

Fixes #880

[codecov]

Codecov Report

Merging #881 (74ca668) into main (6fee30c) will increase coverage by 0.83%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #881      +/-   ##
==========================================
+ Coverage   98.21%   99.05%   +0.83%     
==========================================
  Files         111      111              
  Lines       10408    10633     +225     
==========================================
+ Hits        10222    10532     +310     
+ Misses        186      101      -85     

Impacted Files	Coverage Δ
jupytext/quarto.py	96.66% <100.00%> (+48.33%)	⬆️
tests/conftest.py	100.00% <0.00%> (ø)
tests/test_cli.py	100.00% <0.00%> (ø)
tests/test_pep8.py	100.00% <0.00%> (ø)
tests/test_black.py	100.00% <0.00%> (ø)
tests/test_cells.py	100.00% <0.00%> (ø)
tests/test_isort.py	100.00% <0.00%> (ø)
tests/test_config.py	100.00% <0.00%> (ø)
tests/test_combine.py	100.00% <0.00%> (ø)
tests/test_compare.py	100.00% <0.00%> (ø)
... and 47 more

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