feat(json): part 1 to implement 'any' type

It is a Json object, with a schema as defined elsewhere. It's quite
cool to see this (nearly) working already. However, it will require
us to transitively assign the required markers which is based
on information we don't currently have.

Maybe implementing this could also help to simplify name-clash checks
or make them better at least ?

README.md

@@ -29,10 +29,8 @@ The license of everything not explicitly under a different license are licensed
 
 What follows is a list of other material that is licensed differently.
 
-* **./etc/bin/pyratemp.py** is licensed under MIT-like, as shown in [the header][pyratemp-header] of the file.
 * **./etc/api/\*\*/*.json** are licensed under a [MIT-like google license][google-lic].
 
 
 [oauth]: https://crates.io/crates/yup-oauth2
-[pyratemp-header]: https://github.com/Byron/youtube-rs/blob/master/etc/bin/pyratemp.py
 [google-lic]: https://github.com/google/google-api-go-client/blob/master/LICENSE