Add guide on how to profile pytask.

[tobiasraabe]

Changes

Provide a description and/or bullet points to describe the changes in this PR.

Todo

• Reference issues which can be closed due to this PR with "Closes #x".
• Review whether the documentation needs to be updated.
• Document PR in docs/changes.rst.

[codecov]

Codecov Report

Merging #191 (f72076d) into main (a2a7082) will decrease coverage by 12.98%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             main     #191       +/-   ##
===========================================
- Coverage   92.77%   79.79%   -12.99%     
===========================================
  Files          71       71               
  Lines        6725     6725               
===========================================
- Hits         6239     5366      -873     
- Misses        486     1359      +873     

Flag	Coverage Δ
end_to_end	79.03% <ø> (ø)
integration	41.72% <ø> (ø)
unit	?

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

Impacted Files	Coverage Δ
tests/test_compat.py	28.16% <0.00%> (-71.84%)	⬇️
tests/test_live.py	36.69% <0.00%> (-63.31%)	⬇️
tests/test_capture.py	40.75% <0.00%> (-58.65%)	⬇️
tests/test_outcomes.py	45.45% <0.00%> (-54.55%)	⬇️
tests/test_dag.py	50.00% <0.00%> (-46.74%)	⬇️
tests/test_mark_expression.py	53.33% <0.00%> (-46.67%)	⬇️
tests/test_console.py	57.74% <0.00%> (-40.85%)	⬇️
tests/test_nodes.py	56.52% <0.00%> (-37.40%)	⬇️
tests/test_collect.py	58.97% <0.00%> (-35.05%)	⬇️
tests/test_shared.py	65.00% <0.00%> (-35.00%)	⬇️
... and 24 more

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