Request: Generic Decompressor for all algos based on magic number header

[gabrieljones]

A decompressor that can detect and handle any of the supported algorithms.

Algo	Magic Number	Source
ZStd	28 b5 2f fd	https://en.wikipedia.org/wiki/Zstd
LZ4	04 22 4d 18	https://en.wikipedia.org/wiki/LZ4_(compression_algorithm)
Snappy	ff 06 00 00 73 4e 61 50 70 59	https://en.wikipedia.org/wiki/Snappy_(compression)
LZO	???	https://github.com/mirror/lzop/blob/master/doc/magic
GZIP	1f 8b	https://en.wikipedia.org/wiki/Gzip
Deflate	???	https://en.wikipedia.org/wiki/Deflate
BZip2	BZh	https://en.wikipedia.org/wiki/Bzip2

[gabrieljones]

@wendigo @dain If I made a PR that added this capability would you consider it?