Make JsonConfiguration itself @Serializable

[hfhbd]

What is your use-case and why do you need this feature?
I would like to store the JsonConfiguration itself in a Json file and read them at startup. This allows to use different behavior with a simple change in the config files.

eg having a prod configuration and a debug configuration, which use a less strict Json De-/Encoder or uses pretty print.

Of course, the JsonConfiguration for reading the json configs must be static defined and cannot be defined in the config file.

Describe the solution you'd like
Add @serializable to JsonConfiguration

Current workaorund:
Implement a custom serializer, which I did for my project

[sandwwraith]

Closing for the reason described in #877 (review)

[hfhbd]

Its fine, my implementation was only adding 1 attribute :) But I would like to have the option changing the json behaviour with a config file, even with the new API.

[sandwwraith]

#877 (comment)

[sandwwraith]

Note that current JsonConfiguration is useless for creating new Json instances (as it was intended to be used mainly in encoders/decoders), so one still would need to use JsonBuilder for that.

[sandwwraith]

Not planned because it is still not possible to create Json from JsonConfiguration and JsonConfiguration constructor is intended to be internal.