Move registry to interp and add support for functions and filesystems.
This will be used later for allow formats to add own functions and fq code.
Add gojqextra function helpers to have more comfortable API to add functions.
Takes care of argument type casting and JQValue:s and some more things.
Refactor interp package to use new function helper and registry. Probably
fixes a bunch of JQValue bugs and other type errors.
Refactor out some mpeg nal things to mpeg format.
Refactor interp jq code into display.q and init.jq.
Remove undocumented aes_ctr funciton, was a test. Hopefully will add more crypto things laster.
Add toxml/fromxml for XML encoding, mighe be lossy on ordering
fromxml has {seq:bool} to add #seq attributes to improve ordering
toxml has {indent:number} to choose space indent depth
Add tojson, same as in jq but also has {indent:number} options
Add toyaml/fromyaml for YAML
Add totoml/fromtoml for TOML
Add tojq/fromjq for jq-flavored JSON (optional quotes for keys, comments and trailing commas support)
Add tocsv/fromcsv for CSV
formcvs takes {comma:string, comment:string} for custom separtor and comment character
Rename/split hex into tohex/fromhex
Rename/split base64 into tobase64/frombase64
tobase64/frombase64 takes {encoding:string} option for base64 flavour (std, url, rawstd, rawurl)
Add to/from<format> urlpath, urlquery, url, xmlentities, base64, hex
Add to<hash> md4, md5, sha1, sha256, sha512, sha3_224, sha3_256, sha3_384, sha3_512
Add to/from<encoding> iso8859-1, utf8, utf16, utf16le, utf16be
Rename s/interface{}/any/g
Preparation for using generics in decode API and native jq funcations etc
Remove some unused linter ignores as linter has been fixed
Move scalar into own package.
Split scalar code into decode related scalar code (that reads etc) and
scalar code that just transform the scalar value.
Use a scalar.Mapper interface instead of just a function.
Make mappers, assert and validat impement the interface.
