multimedia/hdrprobe: Add port: Fast HDR, HDR10+, and Dolby Vision metadata inspector

hdrprobe is a single native binary that answers one question quickly:
what HDR and dynamic metadata does this file actually carry?

It does the work that normally requires mediainfo, ffprobe,
dovi_tool, and hdr10plus_tool together
without launching subprocesses in the hot path, writing temp files,
or extracting a full RPU stream to disk first.
It memory-maps the file and reads only the bytes it needs,
so it stays fast regardless of file size.

WWW: https://github.com/matthane/hdrprobe

PR: 296984
Reported by: Michiel van Baak Jansen <michiel@vanbaak.eu> (new maintainer)