[stable31] 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 88.09524% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.44%. Comparing base (e28935b) to head (2b477ee).
⚠️ Report is 6 commits behind head on stable31.

Files with missing lines	Patch %	Lines
src/extensions/TextDirection.ts	87.06%	15 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           stable31    #7512      +/-   ##
============================================
+ Coverage     51.42%   58.44%   +7.02%     
============================================
  Files           291      291              
  Lines         41307    36533    -4774     
  Branches        841      870      +29     
============================================
+ Hits          21241    21352     +111     
+ Misses        19945    15061    -4884     
+ Partials        121      120       -1     

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