chore: bump version to 7.0.0-dev.1

[benjaminfrueh]

bump version on main

[max-nextcloud]

Thanks!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.27%. Comparing base (a691728) to head (8cd38c7).
⚠️ Report is 120 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7747   +/-   ##
=======================================
  Coverage   59.27%   59.27%           
=======================================
  Files         504      504           
  Lines       39233    39233           
  Branches     1137     1137           
=======================================
  Hits        23257    23257           
  Misses      15868    15868           
  Partials      108      108           

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