[Bug]: JSON formatter doesn't escape message

[beeb]

When trying to log to JSON format a message that contains e.g. the debug representation of a struct, the double quotes are not escaped a leads to invalid JSON output.

I suspect other things need to be escaped in the message to generate valid JSON, and I would suggest to defer this to a proper JSON library like serde_json (the industry standard) or tinyjson (never tested myself but fewer deps).

[sdnts]

Thanks for reporting this! Yeah let me look into this as soon as I can!