added "webhooks.unregister_all"

[bigcat88]

Mainly needed for ExApps, but can also be used in some scripts with admin rights.

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 8 lines in your changes missing coverage. Please review.

Project coverage is 94.68%. Comparing base (a56fa6d) to head (5434342).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
nc_py_api/webhooks.py	27.27%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #309      +/-   ##
==========================================
- Coverage   94.82%   94.68%   -0.14%     
==========================================
  Files          46       46              
  Lines        5354     5364      +10     
==========================================
+ Hits         5077     5079       +2     
- Misses        277      285       +8     

Files with missing lines	Coverage Δ
nc_py_api/_version.py	100.00% <100.00%> (ø)
nc_py_api/webhooks.py	54.44% <27.27%> (-4.31%)	⬇️