Kind 20 support for picture notes posted from Olas

[rabble]

Issues covered

Add support for picture notes in feeds

Description

This PR adds support for displaying picture notes (posts containing images) in the feed with an optimized layout. Key changes include:

• Added new PictureNoteCard view component for image-focused note display
• Updated feed views to detect and use picture-specific layout when appropriate
• Added image loading and caching support
• Handles both single and multiple image scenarios
• Maintains consistent styling with existing note cards

How to test

1. Launch app and navigate to main feed
2. Look for posts containing images - they should now show the image prominently
3. Test posting a new note with an image attachment
4. Verify images load properly in both light and dark mode
5. Check that tapping images opens them in full screen viewer
6. Verify multiple image handling works as expected

Screenshots/Video

Updated UI

Old version not displaying kind 20 events.