[stable30] Fixes for TextDirection extension

[backportbot]

Backport of #7509

Todo

• Review and resolve any conflicts
• Amend HEAD commit to remove the line stating to skip CI

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Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.

[codecov]

Codecov Report

❌ Patch coverage is 81.81818% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 51.67%. Comparing base (a182c05) to head (4438faf).
⚠️ Report is 6 commits behind head on stable30.

Files with missing lines	Patch %	Lines
src/extensions/TextDirection.ts	81.53%	12 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           stable30    #7511      +/-   ##
============================================
+ Coverage     50.96%   51.67%   +0.70%     
============================================
  Files           116      117       +1     
  Lines          2739     2804      +65     
  Branches        551      560       +9     
============================================
+ Hits           1396     1449      +53     
- Misses         1212     1225      +13     
+ Partials        131      130       -1     

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