Feature style transfer hub

[LifeJiggy]

• Add style_transfer_hub.py with comprehensive artistic style transfer system
• Implement 10+ built-in artistic styles (impressionism, cubism, anime, watercolor, sketch, oil painting, pop art, surrealism, minimalist, vintage photo)
• Enable custom style creation with user-defined prompts and parameters
• Support batch processing for multiple images
• Include automatic content analysis for better style adaptation
• Provide style strength control and metadata preservation
• Add preset saving/loading functionality

This new feature allows users to transform images into different artistic styles
with one-click operations, perfect for artists, content creators, and creative experimentation."