"feat: add search functionality to file manager"

[Rishi-Tomarji]

Summary

• What does this PR change?
• Why is this change needed?

Type of Change

• Bug fix
• New feature
• Refactor
• Performance improvement
• Documentation update
• CI/CD change
• Other

Changes Made

• List the important code or behavior changes here.
• Mention any UI, preview, install, or keybinding changes explicitly.

Testing

• Built locally
• Ran ./fyzenor --version
• Ran ./fyzenor --help
• Tested interactive behavior manually

Environment

• OS:
• Terminal emulator:
• Shell:

Screenshots or Terminal Output

Add screenshots, recordings, or terminal output if the change affects UI, previews, installation flow, or behavior.

Checklist

• My code follows the existing style of the project
• I kept the change focused and avoided unrelated edits
• I updated documentation when needed
• I checked that this PR does not break existing behavior knowingly

Notes for Reviewers

Add anything reviewers should pay special attention to.