Added is_in_order property

__repr__ is modified to reflect the in_order property:

```
In [1]: import dpctl

In [2]: dpctl.SyclQueue(property="in_order")
Out[2]: <dpctl.SyclQueue at 0x7f5ac2485230, property=in_order>

In [3]: q = _

In [4]: q.is_in_order
Out[4]: True

In [5]: q2 = dpctl.SyclQueue()

In [6]: q2.is_in_order
Out[6]: False

In [7]: q2
Out[7]: <dpctl.SyclQueue at 0x7f5a9a85a8c0>
```

Author: oleksandr-pavlyk

dpctl/_sycl_queue.pyx

@@ -47,6 +47,7 @@ from ._backend cimport (
     DPCTLQueue_SubmitNDRange,
     DPCTLQueue_SubmitRange,
     DPCTLQueue_Wait,
+    DPCTLQueue_IsInOrder,
     DPCTLSyclBackendType,
     DPCTLSyclContextRef,
     DPCTLSyclDeviceSelectorRef,
@@ -729,12 +730,21 @@ cdef class SyclQueue(_SyclQueue):
 
        DPCTLQueue_MemAdvise(self._queue_ref, ptr, count, advice)
 
+    @property
+    def is_in_order(self):
+        """True if SyclQueue is in-order, False if it is out-of-order."""
+        return DPCTLQueue_IsInOrder(self._queue_ref)
+
     @property
     def __name__(self):
         return "SyclQueue"
 
     def __repr__(self):
-        return "<dpctl." + self.__name__ + " at {}>".format(hex(id(self)))
+        cdef cpp_bool in_order = DPCTLQueue_IsInOrder(self._queue_ref)
+        if in_order:
+            return "<dpctl." + self.__name__ + " at {}, property=in_order>".format(hex(id(self)))
+        else:
+            return "<dpctl." + self.__name__ + " at {}>".format(hex(id(self)))
 
     def _get_capsule(self):
         cdef DPCTLSyclQueueRef QRef = NULL