[Enhancement] Use AttributeFilter to use newtonsoft only on the scim controllers

[Tasin5541]

Current implementation of the json serialization and de serialization forces user to add newtonsoft to the controllers globally which is a problem if someone tries to integrate the scim endpoints into their application that's using the default text.json library (starting from .net core 3.1) which doesn't support DataContract. In this case adding newtonsoft globally is a big no.

We can use the ActionFilterAttribute Class to ensure the scim endpoints use newtonsoft and the other endpoints keep working as it is.

[Tasin5541]

I would like to work on this if the maintainers approve

[boscoMW]

I would like to work on this if the maintainers approve

Please go ahead,

[RohitTopkhane]

Can we get solution without Extension newsoft.json

[Sefriol]

@RohitTopkhane Doable, but it would require whole Microsoft.SystemForCrossDomainIdentityManagement/Protocol to be modified to use System.Text.Json. There is a lot of OnInitialization / Initialized all over the place which I am unsure how meaningful they are. In addition, there is also a bunch of Json Serialization / Deserialization Factory stuff that I am not so sure about.