Fixes long register packet handling and synchronization issues in the binary stream layer; makes reads non-blocking and robust to partial frames.

[ecarjat]

Summary

• This change replaces blocking direct Stream reads with an internal RX ring buffer and non-blocking helpers, making BinaryIO tolerant of fragmented/partial frames and avoiding buffer overruns. Packet parsing now always resynchronizes to MARKER_BYTE, validates payload sizes, and defers incomplete payloads using a _pending state until the full payload arrives. Multi-byte primitive reads use safe assembly (memcpy) and <string.h> is included.

Changelog

• Added: RX ring buffer and helpers (_rx_fill(), _rx_available(), _rx_peek(), _rx_read()) in BinaryIO.h and implemented in BinaryIO.cpp.
• Changed: operator>> for float, uint32_t, and uint8_t to consume only available bytes and decrement remaining by actual bytes read.
• Changed: Packet parsing to always resync to MARKER_BYTE, discard pre-marker bytes, safely read size/type, and handle incomplete payloads by setting _pending (_pending_type, _pending_payload) until the full payload is buffered.
• Added: BINARYIO_RX_BUFFER_SIZE default and checks to reject frames whose payload would exceed buffer capacity (drops out-of-sync on overflow).
• Safety: Use of memcpy and inclusion of <string.h> for reliable multi-byte assembly.