Add Copy Button for Shortened URL in Home Page

[prajna321]

• Adds a "Copy" button to the home page for easy URL management.
• Utilizes an SVG icon for clear visual representation.
• Implements one-click functionality to copy the shortened URL.
• Provides instant feedback with a brief "Copied!" message.
• Enhances user experience and usability.

Please review and merge this PR as necessary. Thank you!

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[abhijeetnishal]

Closes #61

[abhijeetnishal]

This issue haven't done properly throwing error. I am fixing it now.