Add product reviews

[DennisGarding]

Added product reviews to the demo data

needs Major

[MalteJanz]

Please also add a PR description

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.74%. Comparing base (dab527d) to head (5712a2a).

Additional details and impacted files

@@             Coverage Diff              @@
##              trunk      #16      +/-   ##
============================================
+ Coverage     96.71%   96.74%   +0.03%     
- Complexity      100      101       +1     
============================================
  Files            13       14       +1     
  Lines          1553     1538      -15     
============================================
- Hits           1502     1488      -14     
+ Misses           51       50       -1     

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