Provide a function like COMPILE-ENCODE

[phmarek]

I've got a use-case where during runtime some data is read from disk; later on a JSON with lots of constant data and some variables will be queried.

COMPILE-ENCODE as a macro that parses LIST etc. by hand makes that harder to do than necessary; I can't provide it with forms like (LET ((#:gensym1 (....))) ...), perhaps some escaping/unescaping mechanism like with CL-WHO might be a good idea?