Add support for Distributions.ProductDistribution

[oschulz]

No description provided.

[codecov]

Codecov Report

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

Project coverage is 71.75%. Comparing base (4f0cddb) to head (70af67a).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/shapes.jl	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #54      +/-   ##
==========================================
- Coverage   71.84%   71.75%   -0.09%     
==========================================
  Files          10       10              
  Lines         341      347       +6     
==========================================
+ Hits          245      249       +4     
- Misses         96       98       +2     

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[oschulz]

JuliaRegistries/General#128891

CC @philippeller