.Data() support dynamic

[SerratedSharp]

JQueryPlainObject .Data() would ideally return a dynamic and perform similar serialization and JSObject reference replacement similar to the passthru of event data.

Or consider simply returning it as a JSObject reference and require use of JSObject.GetPropertyAs* to interact with.

Could also implement the dynamic interface which calls GetPropertyAs* automatically, but this likely will be misleading and not make it clear that every property access results in a JS interop call.

[SerratedSharp]

Implemented public JSObject DataAsJSObject() to provide access to entire Data() object reference. This allows caller to use JSObject.GetPropertyAs* methods to access properties unambiguously or pass entire reference to GlobalJS.Console.Log(obj) to log entire object graph in browser console.

Implemented in d2406a1

Supporting more intuitive access/deserialization is more appropriate for future JQueryObject