Adding new formats

[lesf0]

Hi!

I'd like to add support for YSON format (which is yet another binary json-alike format with extra stuff used by Yandex) input/output to yq, so there's a couple questions:

• Would you consider accepting my PR if I'll submit it, or you'd rather settle in with the formats you already have and won't want to bloat up the code?
• Is there a guide or example of adding a new format? Should I just implement decode_yson / encode_yson and add those to Formats, or is there more to it?

[mikefarah]

Adding new formats is reasonably straight forward, as you say you need to implement those functions and add the formats.

The question as to whether it makes sense to add YSON or not...I haven't heard of YSON; I'm happy to accept a PR for it if we get a few more votes on this. Otherwise I fear it'd just be adding bloat, like you say, to the binary, as well as extra maintenance overhead