Add Turkish, Vietnamese and social icons

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

Language-specific documentation links now direct to the "hub" section!

Updated language documentation links to include "/hub" in the URL, making these links more specific and relevant to the hub's content.

Enhanced User Experience: Users can now directly access hub-specific documentation in their preferred language, making it easier and faster to find relevant information. 🌍
Clarity and Precision: These changes aim to reduce confusion by directing users to the most applicable section of the documentation for their needs. 🎯
Potential Impact: Could significantly improve how users from different linguistic backgrounds interact with the hub, fostering a more inclusive and user-friendly environment. 🔍