Create types for untyped nodes

[rohitkrsoni]

To support untyped JSON (microsoft/kiota#4385), create the following types:

UntypedDict
UntypedList
UntypedStr
UntypedInt
UntypedBool
UntypedNone
These types need to derive from UntypedNode that extends Parsable

[rohitkrsoni]

Please assign it to me