4.x
Added TOC to most of tutorials
Merge pull request #26018 from Kumataro:fix26017
Merge pull request #25042 from mshabunin:doc-upgrade
Merge remote-tracking branch 'upstream/3.4' into merge-3.4
Backport C-API cleanup (imgproc) from 5.x
fix 4.x links
Make T a math symbol
Merge pull request #24521 from dkurt:fix_broken_urls
Fix typos in tutorials within docs/
doc: tutorial refactor