feat: support scanning `rpm` databases

[G-Rath]

Resolves #254

[codecov-commenter]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 67.27%. Comparing base (a800ce5) to head (9d9745a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2234      +/-   ##
==========================================
- Coverage   67.52%   67.27%   -0.25%     
==========================================
  Files         169      169              
  Lines       16273    16273              
==========================================
- Hits        10988    10948      -40     
- Misses       4607     4641      +34     
- Partials      678      684       +6     

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