[docs/json]: expands existing examples + shows {} operator in action (#9157)
[docs/json]: expands existing examples + shows {} operator in action (#9157)

* [docs/json]: expands existing examples + shows {} operator in action

* adds import stmt and fixes butchered syntax in json examples

dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim