Add Monstra - High-performance Swift caching framework

[yangchenlarkin]

Add Monstra to Cache section

Monstra is a high-performance Swift framework providing:

• TTL-based memory caching with avalanche protection
• Priority-based LRU eviction strategies
• Thread-safe execution with semaphores
• Cross-platform support (iOS, macOS, tvOS, watchOS)
• Zero dependencies with 99%+ test coverage
• Comprehensive documentation and examples

Repository: https://github.com/yangchenlarkin/Monstra
Documentation: https://yangchenlarkin.github.io/Monstra/
License: MIT
Version: 0.0.9 (semantic versioning)

Solves common iOS development challenges around memory management, task execution, and caching with production-ready implementations.

• Project Name:
• Project URL:
• Project Description:
• Why it should be added to awesome-swift:
• At least 15 stars (GitHub project)
• Support Swift 5
• Updated contents.json instead of README
• Lib is fully open sourced, written in Swift and not a wrapper over compiled lib
• Description does not say "written in Swift" or variant 🤓