✨: add HasArrayRLShift protocol to support right left shift operator for array classes

Author: nstarman

src/array_api_typing/_array.py

@@ -640,6 +640,22 @@ def __ilshift__(self, other: Self | int, /) -> Self:
         ...
 
 
+class HasArrayRLShift(Protocol):
+    """Protocol for array classes that support the right left shift operator."""
+
+    def __rlshift__(self, other: Self | int, /) -> Self:
+        """Calculates the left shift for each element of an array instance with the respective element of the array other.
+
+        Args:
+            other: operand array. Must be compatible with self (see Broadcasting). Should have an integer data type.
+
+        Returns:
+            an array containing the element-wise left shifts. The returned array must have a data type determined by Type Promotion Rules.
+
+        """  # noqa: E501
+        ...
+
+
 class HasArrayRShift(Protocol):
     """Protocol for array classes that support the right shift operator."""
 
@@ -808,6 +824,7 @@ class Array(
     HasArrayRXor,
     HasArrayLShift,
     HasArrayILShift,
+    HasArrayRLShift,
     HasArrayRShift,
     HasArrayIRShift,
     HasArrayLT,