Feature request: Support System.Text.Json(.Nodes)

[MJLHThomassenHadrian]

Currently this extension depends on Newtonsoft.Json. We are using System.Text.Json(.Nodes). It would be a nice addition to have a package that does not rely on Newtonsoft.Json and can do the same assertions.

[dennisdoomen]

I think that when we implement this, we should also rename the existing FluentAssertions.Json package as FluentAssertions.NewtonSoftJson

[Corniel]

We're working on this: fluentassertions/fluentassertions#2205