Add download feature to support file access

[Hemavathi15sg]

Summary

Implement a download feature in the CourseApplication repository to allow users to download necessary files or data conveniently from the application.

Details

• Enable users to download course materials or reports directly from the application interface.
• Consider options to download different file formats (e.g., PDF, DOCX, CSV) if applicable.
• Ensure proper user permissions and security checks for downloads.
• Present a clear UI/UX for locating and initiating downloads.

Acceptance Criteria

• A "Download" button is available where appropriate.
• Files are downloaded reliably and securely.
• The feature is tested and documented.

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Please provide feedback if there are particular file types or download locations that should be prioritized.