feat(heuristics): add three analyzers to detect dependency confusion and distinguish from stub packages

[AmineRaouane]

Summary

This PR adds three new heuristic analyzers designed to detect potential dependency confusion attacks and differentiate them from harmless stub or placeholder packages.

Description of changes

• Implemented three new analyzers :
  • minimal_content : Indicates that the package has minimal content ( low number of files).
  • unsecure_description : Indicates that the package's description is unsecure, such as not having a descriptive keywords that indicates it's a stub package .
• Integrated these analyzers into the heuristics.py.
• The UNKNOWN_ORGANIZATION and UNSECURE_DESCRIPTION were added to ONE_RELEASE and ANOMALOUS_VERSION to ensure that a package isn’t just a stub when they are triggered.

Related issues

None

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