add h266/vvc feature

Implementation is underway. Parsing of Vps, Sps, Pps, and Aps with their associated sections has been implemented. Debugging and fine-tuning are in progress.

Reference bitstreams are TS-encapsulated due to unavailability of the MP4 specification. Test streams are generated via a GStreamer VVC plugin leveraging vvcenc or uvg266 encoders with a modified TS multiplexer

