[Feature] #4126 : Added h2 header to the event title for each appointment

[arublov]

• Resolves: Add headings to appointments #4126

[arublov]

@ChristophWurst I only added a title in hidden h2 header, do I need to add time? if yes, what's it supposed to look like?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 24.19%. Comparing base (3369fc8) to head (a102160).
Report is 192 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #5782   +/-   ##
=========================================
  Coverage     24.19%   24.19%           
  Complexity      423      423           
=========================================
  Files           243      243           
  Lines         11005    11005           
  Branches       1825     1825           
=========================================
  Hits           2663     2663           
  Misses         8342     8342           

Flag	Coverage Δ
javascript	15.11% <ø> (ø)
php	61.97% <ø> (ø)

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