model.datatypes: add DateTimeStamp to AnyXSDType

The AAS Manager uses typehints to generate a list of possible types for
a value. Since `DateTimeStamp` was missing, it was impossible to store a
`DateTimeStamp` value via AAS Manager.

basyx/aas/model/datatypes.py

@@ -375,10 +375,10 @@ def from_string(cls, value: str) -> "NormalizedString":
 
 
 AnyXSDType = Union[
- Duration, DayTimeDuration, YearMonthDuration, DateTime, Date, Time, GYearMonth, GYear, GMonthDay, GMonth, GDay,
- Boolean, Base64Binary, HexBinary, Float, Double, Decimal, Integer, Long, Int, Short, Byte, NonPositiveInteger,
- NegativeInteger, NonNegativeInteger, PositiveInteger, UnsignedLong, UnsignedInt, UnsignedShort, UnsignedByte,
- AnyURI, String, NormalizedString]
+ Duration, DayTimeDuration, YearMonthDuration, DateTime, DateTimeStamp, Date, Time, GYearMonth, GYear, GMonthDay,
+ GMonth, GDay, Boolean, Base64Binary, HexBinary, Float, Double, Decimal, Integer, Long, Int, Short, Byte,
+ NonPositiveInteger, NegativeInteger, NonNegativeInteger, PositiveInteger, UnsignedLong, UnsignedInt, UnsignedShort,
+ UnsignedByte, AnyURI, String, NormalizedString]
 
 
 XSD_TYPE_NAMES: Dict[Type[AnyXSDType], str] = {