[WIP] Enhance repository for learner engagement and professionalism

[Copilot]

• Explore repository structure and existing documentation
• Analyze gaps for making repository more professional for learning and CV purposes
• Identify and implement improvements:
  • Add CODE_OF_CONDUCT.md (separate file for professionalism)
  • Add SECURITY.md for vulnerability reporting
  • Add GitHub Actions CI workflow for notebook validation
  • Consider adding a .github/ISSUE_TEMPLATE directory
  • Consider adding a .github/PULL_REQUEST_TEMPLATE.md
  • Review and enhance any missing elements
• Run code review
• Run security check

Original prompt

what is reamaing to make the repo look more professional? so that viewers can use it for learning and studying and I can use it in my cv while applying for job

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