Function parse_annotated_date_time 

pub(crate) fn parse_annotated_date_time<'a, T: EncodingType>(
    cursor: &mut Cursor<'a, T>,
    handler: impl FnMut(Annotation<'a, T>) -> Option<Annotation<'a, T>>,
) -> ParserResult<IxdtfParseRecord<'a, T>>

This function handles parsing for AnnotatedDateTime, AnnotatedDateTimeTimeRequred, and TemporalInstantString. according to the requirements provided via Spec.