Core crates:
- cascette-crypto: MD5, Jenkins96, Salsa20, ARC4, TACT key management
- cascette-formats: Binary format parsers/builders for NGDP/CASC
- cascette-cache: Multi-layer caching for NGDP/CDN content

Features:
- Rust 2024 Edition with MSRV 1.86.0
- WASM compilation support
- Workspace-level clippy lints
- CI workflow with quality checks