docs: v0.5.1 release notes (#1482)

Author: cpcloud

cuda_core/docs/source/release/0.5.1-notes.rst

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+.. SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+.. SPDX-License-Identifier: Apache-2.0
+
+.. currentmodule:: cuda.core
+
+``cuda.core`` 0.5.1 Release Notes
+=================================
+
+New features
+------------
+
+- Added the ability to construct ``StridedMemoryView`` from numpy arrays using ``StridedMemoryView.from_array_interface``
+
+Fixes and enhancements
+----------------------
+
+- Better structured dtype support for ``StridedMemoryView``
+- Remove warning module overhead when constructing ``StridedMemoryView``