Option to store payload data as JSON

[pablosymc]

I understand that payload data in Carp is stored in a format that can be parsed by CML, however I would love if there was an option to just store the data in JSON for example. This would make it so that no tools were needed to parse the payload data.

For example if I want to run SQL queries via a Cloudflare Worker, I unfortunately wouldn't be able to parse the payload with CML, as it wouldn't be able to run in that environment (hence why just having the default payload data in JSON would be awesome).

I'm sure there's a way to do it with WASM or something of that sort, but just having access to the payload data as JSON would make things so much easier, and keep my bundle size much smaller.