Add support for sycl accessors

This MR extends the sycl support:

• Adding function so that sycl::accessors can be used in the map_field function
• Changes the API of the cgh.parrallel_for to work like the API of sfg.function

src/pystencilssfg/extensions/sycl.py

@@ -59,7 +59,13 @@ class SyclHandler(AugExpr):
 
         self._ctx = ctx
 
-    def parallel_for(self, range: SfgVar | Sequence[int], kernel: SfgKernelHandle, *, extras: Sequence[SequencerArg]=[]):
+    def parallel_for(
+        self,
+        range: SfgVar | Sequence[int],
+        kernel: SfgKernelHandle,
+        *,
+        extras: Sequence[SequencerArg] = [],
+    ):
         """Generate a ``parallel_for`` kernel invocation using this command group handler.
 
         Args: