feat: add workflow to automatically close duplicate issues

[rexdivakar]

📝 Description

Please provide a clear and concise description of the changes made in this pull request.

If you used any AI tool (e.g., ChatGPT, GitHub Copilot, etc.) to help generate code or documentation,
please mention it here for transparency.

Example:

Added new API endpoint for fetching user data. Used ChatGPT to generate initial function structure.

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✅ Contributors Checklist

Please make sure you have completed all of the following before submitting this PR:

• My PR closes the issue number: Add workflow: .github/workflows/auto-close-duplicates.yml #59
• I have followed the repository's contribution guidelines and workflow.
• I have tested my changes and verified they work as expected.
• I have updated or added necessary documentation.

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🔍 Review Checklist

Before marking your PR as ready for review, ensure:

• I have self-reviewed my changes.
• The PR description clearly explains what has been changed and why.
• All linting/tests (if applicable) pass successfully.
• My PR is complete and ready for review.

[matvix90]

Hi @rexdivakar, before I can verify your PR, you must:

• Close this one and open one on a dedicated branch, not the main one.
• In the description, describe in detail what you created.

For more details, check the CONTRIBUTING.md file and follow the step-by-step guide.

Thanks!