Reader and writer for Colorlight .rcvbp receiver-parameter files
(docs/rcvbp-format.md). The record stream must tile the blob exactly.
file: [32-byte header][zlib stream][u32 CRC trailer]
header: 0x00 16 bytes signature
0x10 u32 version (4)
0x14 u32 compressed size
0x18 u32 decompressed size
0x1c u32 reserved (0)
record: [u16 size_le][u16 type][payload; size-4] (size counts the header)