refactor: assets

[justinenerio]

Changes

• removed unused assets
• updated asset folder structure

assets/           
├── brands/       # Brand related logos
│   ├── telegram.svg
│   ├── solana.svg
│   ├── swift.svg
│   └── ...       
├── partners/     # Ramp Partner-specific resources
│   ├── coinflow/ 
│   └── ...      
├── fonts/        # Fonts used in the project
├── gifs/         # Animated graphics
├── icons/        # Icons for the UI
├── images/       # General image resources
├── rive/         # Animation files 
└── tokens/       # Local Token file

Checklist

• PR is ready for review (if not, it should be a draft).
• PR title follows Conventional Commits guidelines.
• Screenshots/video added.
• Tests added.
• Self-review done.