- Add MonaLisaCDM class wrapping wasmtime for key extraction
- Add MonaLisa DRM class with decrypt_segment() for per-segment decryption
- Display Content ID and keys in download output (matching Widevine/PlayReady)
- Add wasmtime dependency for WASM module execution
Add new CustomRemoteCDM class to support custom CDM API providers with maximum configurability through YAML configuration alone. This addresses GitHub issue #26 by enabling integration with third-party CDM APIs.