feat: Add binary ’hlog’ encode/decode support for Histograms

[hassila]

As suggested by Gil Tene - basically improves interop with any existing tools.

[hassila]

See some discussions of hgrm/hlog here - hgrm we already have.

HdrHistogram/HdrHistogram#170 (comment)

[blindspotbounty]

@hassila I took a look at related cases.
Could you advise whether we want to port compatible upstream binary encoding, please?

[hassila]

@blindspotbounty that was the idea, to fully support hlog format too.