Add musllinux and Windows ARM64 platform support

- Add musllinux_x86_64 and musllinux_aarch64 for Python 3.8-3.14 (Alpine Linux)
- Add win_arm64 for Python 3.11-3.14 (Windows on ARM)
- Configure CIBW_MUSLLINUX_*_IMAGE environment variables
- Total wheels: 35 → 67 (32 new platforms)
  - Windows ARM64: +4 wheels
  - musllinux x86_64: +14 wheels
  - musllinux aarch64: +14 wheels

Author: atksh

.github/workflows/cibuildwheel.yml

@@ -166,6 +166,99 @@ jobs:
             macosx_deployment_target: 10.14
             arch: x86_64
 
+          # Windows ARM64
+          # Note: Python 3.11+ only, as earlier versions lack official ARM64 builds
+          - os: windows-latest
+            python: 311
+            platform_id: win_arm64
+            arch: ARM64
+          - os: windows-latest
+            python: 312
+            platform_id: win_arm64
+            arch: ARM64
+          - os: windows-latest
+            python: 313
+            platform_id: win_arm64
+            arch: ARM64
+          - os: windows-latest
+            python: 314
+            platform_id: win_arm64
+            arch: ARM64
+
+          # Linux musllinux x86_64 (Alpine Linux)
+          - os: ubuntu-latest
+            python: 38
+            platform_id: musllinux_x86_64
+            musllinux_image: musllinux_1_1
+            arch: x86_64
+          - os: ubuntu-latest
+            python: 39
+            platform_id: musllinux_x86_64
+            musllinux_image: musllinux_1_1
+            arch: x86_64
+          - os: ubuntu-latest
+            python: 310
+            platform_id: musllinux_x86_64
+            musllinux_image: musllinux_1_1
+            arch: x86_64
+          - os: ubuntu-latest
+            python: 311
+            platform_id: musllinux_x86_64
+            musllinux_image: musllinux_1_1
+            arch: x86_64
+          - os: ubuntu-latest
+            python: 312
+            platform_id: musllinux_x86_64
+            musllinux_image: musllinux_1_1
+            arch: x86_64
+          - os: ubuntu-latest
+            python: 313
+            platform_id: musllinux_x86_64
+            musllinux_image: musllinux_1_2
+            arch: x86_64
+          - os: ubuntu-latest
+            python: 314
+            platform_id: musllinux_x86_64
+            musllinux_image: musllinux_1_2
+            arch: x86_64
+
+          # Linux musllinux aarch64 (Alpine Linux ARM64)
+          - os: ubuntu-latest
+            python: 38
+            platform_id: musllinux_aarch64
+            musllinux_image: musllinux_1_1
+            arch: aarch64
+          - os: ubuntu-latest
+            python: 39
+            platform_id: musllinux_aarch64
+            musllinux_image: musllinux_1_1
+            arch: aarch64
+          - os: ubuntu-latest
+            python: 310
+            platform_id: musllinux_aarch64
+            musllinux_image: musllinux_1_1
+            arch: aarch64
+          - os: ubuntu-latest
+            python: 311
+            platform_id: musllinux_aarch64
+            musllinux_image: musllinux_1_1
+            arch: aarch64
+          - os: ubuntu-latest
+            python: 312
+            platform_id: musllinux_aarch64
+            musllinux_image: musllinux_1_1
+            arch: aarch64
+          - os: ubuntu-latest
+            python: 313
+            platform_id: musllinux_aarch64
+            musllinux_image: musllinux_1_2
+            arch: aarch64
+          - os: ubuntu-latest
+            python: 314
+            platform_id: musllinux_aarch64
+            musllinux_image: musllinux_1_2
+            arch: aarch64
+
           # MacOS arm64
           - os: macos-14
             python: 38
@@ -222,6 +315,8 @@ jobs:
         env:
           CIBW_MANYLINUX_X86_64_IMAGE: ${{ matrix.manylinux_image }}
           CIBW_MANYLINUX_AARCH64_IMAGE: ${{ matrix.manylinux_image }}
+          CIBW_MUSLLINUX_X86_64_IMAGE: ${{ matrix.musllinux_image }}
+          CIBW_MUSLLINUX_AARCH64_IMAGE: ${{ matrix.musllinux_image }}
           CIBW_BUILD: cp${{ matrix.python }}-${{ matrix.platform_id }}
           CIBW_BEFORE_BUILD: pip install pybind11
           CIBW_TEST_COMMAND: python {project}/tests/_ci_debug_import.py && pytest {project}/tests -vv