[PUI] Make breadcrumbs adjustable

[matmair]

Makes usage of breadcrumbs more uniform and adds a user setting to optionally show the current item in the breadcrumbs too.

[netlify]

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[matmair]

see #7962

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 83.71%. Comparing base (30ab365) to head (1b9ddf7).

Files with missing lines	Patch %	Lines
src/frontend/src/components/nav/PageDetail.tsx	66.66%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8027      +/-   ##
==========================================
- Coverage   83.75%   83.71%   -0.05%     
==========================================
  Files        1143     1143              
  Lines       51084    51089       +5     
  Branches     1790     1792       +2     
==========================================
- Hits        42787    42768      -19     
- Misses       7836     7874      +38     
+ Partials      461      447      -14     

Flag	Coverage Δ
backend	85.71% <ø> (ø)
pui	64.56% <66.66%> (-0.27%)	⬇️

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