Remove sensitive personal information and secure repository

[Copilot]

This PR addresses a critical privacy and security vulnerability where sensitive personal information was committed to the repository in public_info.txt. The file contained detailed private information about an individual that should never be in a public repository.

Changes Made

Security remediation:

• Completely sanitized public_info.txt by removing all sensitive personal data
• Replaced content with a clear privacy notice explaining the file's purpose
• Added public_info.txt to .gitignore to prevent future accidental commits of sensitive information

Application verification:

• Confirmed the Next.js application builds successfully and passes all linting checks
• Verified no other files in the repository contain sensitive information
• Ensured all core functionality remains intact

The repository now maintains proper privacy standards while preserving the working Next.js application. The .gitignore addition provides ongoing protection against similar incidents in the future.

Fixes #2.

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[Honest2all]

Delete all from existence