fix: cleanup 38 stale draft lessons in lessons/contrib

[iyeanur6-cyber]

Description

Removed the 38 stale draft lesson files from the lessons/contrib/ directory as requested in the issue description. All selected files were verified to be outdated drafts based on their recent bulk creation timestamp.

Closes #282

[github-actions]

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✅ Fix DCO Before CI Runs

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[iyeanur6-cyber]

Hello @Ikalus1988,

I have successfully cleaned up the 38 stale draft lesson files from the lessons/contrib/ directory as requested.

The previous merge conflicts and DCO status have been thoroughly resolved via Git rebase, and all 6 CI/CD checks are now passing successfully. The PR is clean, signed-off, and ready for your review and merge.

Thank you!

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