Add support for System.Text.Json

[spointeau]

Is your feature request related to a problem? Please describe.
I would like to log correctly json document or json element from System.Text.Json

Describe the solution you'd like
Similar to JSON.NET types.

[nblumhardt]

This repo is only targeting JSON.NET; we'd need to stand up a new repository for this. The amount of code involved is pretty small though: https://gist.github.com/nblumhardt/8aea89e86663829170d08aa573bd0f49 - HTH!

[github-actions]

This issue was marked as stale since it has not been active for a long time