fix: Load focus trap extension in markdown content editor

[juliusknorr]

Fix nextcloud/deck#6550

We should make sure to also load the focus trap plugin when using the markdown content editor e.g. in deck as otherwise using the tab key will just focus on the next element instead of triggering editor functionality first.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 46.59%. Comparing base (6702ab9) to head (d15759b).
Report is 17 commits behind head on main.

Files with missing lines	Patch %	Lines
src/components/Editor/MarkdownContentEditor.vue	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6823      +/-   ##
==========================================
+ Coverage   46.56%   46.59%   +0.02%     
==========================================
  Files         748      733      -15     
  Lines       34307    34290      -17     
  Branches     1242     1227      -15     
==========================================
  Hits        15976    15976              
+ Misses      17709    17707       -2     
+ Partials      622      607      -15     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.