[System.Text.Json] Support to configure `Enumerable` as `Object`

[CoreDX9]

Package X.PagedList has interface IPagedList<T>. IPagedList<T> implement IEnumerable<T>, so object will serialize into an array. But IPagedList<T> have more properties to record paging information. It should be serialize into an object, than use a property to serialize items.

I hope developers can only configure property name of items to make Enumerable as Object, and other properties will configure automatically.

[MihuBot]

I'm a bot. Here are possible related and/or duplicate issues (I may be wrong):

• Provide option for the serializer to treat IEnumerables like objects with members #1808
• How to json serialize custom/derived collection/list types? #124625
• Provide option for the serializer to treat IEnumerables like objects with members #30855
• System.Text.Json Deserialization throws NotSupportedException when implementing IEnumerable<T> #46920
• Developers should have access to System.Text.Json's default internal converters #63791

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