Add direct editing route to routes.php

[georgehrke]

fixes routing from nextcloud/server#22020

[codecov]

Codecov Report

Merging #2450 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #2450   +/-   ##
=========================================
  Coverage     30.36%   30.36%           
  Complexity      103      103           
=========================================
  Files           146      146           
  Lines          5354     5354           
  Branches        802      802           
=========================================
  Hits           1626     1626           
  Misses         3728     3728           

Flag	Coverage Δ	Complexity Δ
#javascript	25.28% <ø> (ø)	0.00 <ø> (ø)
#php	94.41% <ø> (ø)	103.00 <ø> (ø)

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[tcitworld]

What's the benefit over the calendar.view.indexview.timerange.edit route (which I previously used in nextcloud/server#19039)?

[georgehrke]

One benefit is, that this route will automatically use the user-preferred view.
Later on, my plan is to automatically navigate to the correct date in the grid view.

[georgehrke]

#2483