✨: add HasArrayRPow protocol

Support right power operator for array classes

Author: nstarman

src/array_api_typing/_array.py

@@ -370,6 +370,22 @@ def __ipow__(self, other: Self | int | float, /) -> Self:
         ...
 
 
+class CanArrayRPow(Protocol):
+    """Protocol for array classes that support the right power operator."""
+
+    def __rpow__(self, other: Self | int | float, /) -> Self:
+        """Calculates the power for each element of an array instance with the respective element of the array other.
+
+        Args:
+            other: exponent array. Must be compatible with self (see Broadcasting). Should have a numeric data type.
+
+        Returns:
+            an array containing the element-wise powers. The returned array must have a data type determined by Type Promotion Rules.
+
+        """  # noqa: E501
+        ...
+
+
 class Array(
     HasArrayNamespace[NS_co],
     CanArrayPos,
@@ -392,6 +408,7 @@ class Array(
     CanArrayIMod,
     CanArrayPow,
     CanArrayIPow,
+    CanArrayRPow,
     Protocol,
 ):
     """Array API specification for array object attributes and methods."""