Add factory builder

[myty]

This is so factories can be successfully imported into dependent projects

• [-] Related GitHub issue(s) linked in PR description
• Destination branch merged, built and tested with your changes
• Code formatted and follows best practices and patterns
• Code builds cleanly (no additional warnings or errors)
• Manually tested
• Automated tests are passing
• No decreases in automated test coverage
• Documentation updated (readme, docs, comments, etc.)
• Localization: No hard-coded error messages in code files (minimally in string constants)

[codecov]

Codecov Report

Merging #51 (a095861) into main (8cf2376) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #51   +/-   ##
=======================================
  Coverage   97.67%   97.67%           
=======================================
  Files           2        2           
  Lines          43       43           
  Branches        8        8           
=======================================
  Hits           42       42           
  Misses          1        1           

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