Base64 support

[Terin Stock]

jq has support for encoding and decoding base64 strings (@base64 and @base64d respectfully). I often want to work with collections that have base64 strings, but found there's currently no support.

I've found that this does work (though very verbose) in Babashka, but not in jet.

(String. (.. java.util.Base64 getDecoder (decode "TWFueSBoYW5kcyBtYWtlIGxpZ2h0IHdvcmsu")))
;"Many hands make light work."

[Michiel Borkent]

Is your proposal to make the babashka example work in jet, or to offer functions to decode and encode base64?

[Terin Stock]

I would definitely prefer something shorter, if possible.

[Michiel Borkent]

We could add base64/decode and base64/encode (which go from string to string)?

[Terin Stock]

That seems like a reasonable compromise for me.

[Michiel Borkent]

Available as jet 0.4.23