Add share blog feature with link shortening

[Prajwal-kp-18]

Description:
Enable users to share blogs easily by generating a shortened link. This will improve accessibility and usability by providing concise, shareable URLs.

Tasks:

• Add a "Share" button to each blog post.
• Integrate a link-shortening service (e.g., Bitly, TinyURL, or an in-house URL shortener).
• Generate and display a shortened URL when the share button is clicked.
• Allow users to copy the shortened link easily.

Expected Outcome:
Users can share blog posts using a shortened link, making it easier to distribute content across different platforms.