Implement Social Sharing

Integrate social media sharing buttons (e.g., Twitter, LinkedIn) on code snippets, allowing users to share snippets with their networks.

## Expectations

- Sharing buttons are available on code snippets.
- Users can share snippets on social media platforms.

No files or tests are identified in the issue. Start by locating the code-snippet UI in the React frontend and review how snippet actions are currently rendered; done means sharing controls appear on snippets and users can share them through the selected social platforms.

Written by the indexing model from the issue text.