Release v0.2.2

Release v0.2.2

Features:

• Add strict_image_refs option to control image reference behavior
• Rename is_image to is_embed for better clarity

Performance:

• Add caching for file resolution and pattern matching
• Optimize reference resolution with basename cache
• Pre-compile regex patterns for faster matching
• Add reference map for faster link checking

Documentation:

• Update documentation for new features and options
• Add comprehensive test cases