[P2] Advanced Features and Optimizations

[shayonpal]

Description

Implement advanced features like snippet templates, bulk operations, and performance optimizations.

Acceptance Criteria

• Add snippet template system
• Implement bulk edit/delete operations
• Add snippet export/import functionality
• Include search and filtering capabilities
• Optimize batch processing performance
• Add snippet backup and restore features

Technical Requirements

• Template system with variable substitution
• Efficient algorithms for large snippet collections
• Export formats compatible with other snippet managers
• Search functionality across content and metadata
• Incremental backup capabilities

Dependencies

• All P0 and P1 issues for stable foundation

Files to Create

• src/templates.py
• src/backup.py
• src/search.py
• examples/templates/