release python riscv64 wheel

[nihui]

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[Copilot]

Pull request overview

This PR adds support for building Python wheels for the RISC-V 64-bit architecture and updates Windows runner images in the release workflow.

Key changes include:

• Added EXTRA_CMAKE_ARGS environment variable support in setup.py for passing custom CMake arguments
• Introduced a new QEMU-based build job for RISC-V 64-bit wheels covering Python 3.8-3.13 on both manylinux and musllinux
• Updated Windows runner references from windows-2022 to windows-2025 and introduced windows-11-arm for ARM64 builds

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
setup.py	Added EXTRA_CMAKE_ARGS environment variable support to allow passing custom CMake arguments during wheel builds
.github/workflows/release-python.yml	Added new build_wheels_qemu_cp job for RISC-V wheel builds, updated Windows runner versions, and modified upload_all dependencies

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