Implement AR Photo Mode with Social Sharing

[DonWick32]

Add an "AR Photo Mode" where users can take photos with virtual treasures and share them on social media. Include a default template overlay showing their rank and completion time.

This feature involves:

• Creating a UI button to trigger AR Photo Mode.
• Capturing the AR scene with virtual treasures overlaid on the camera feed.
• Adding a template overlay with user's rank and completion time (data to be fetched from user profile/backend).
• Implementing social sharing functionality (e.g., using Android Share Intent).