Proposal: format JSON by default

[Wígny Almeida]

Currently, AFAIK, the JSON module does not provide out-of-the-box a way of pretty encoding a term into JSON, but checking the Erlang docs, it seems that we have since v27.1 a format function that encodes terms into JSON with additional whitespaces for better formatting.

I wonder if Elixir's JSON module should use this function by default when encoding terms.