Add Alpine package build target and metadata generation

- Create CMake target for generating Alpine package (apk)
- Add APKBUILD metadata generation in GitHub workflow
- Configure package details including version, description, and dependencies
- Streamline Alpine package creation process

.github/workflows/build-alpine.yml

@@ -54,7 +54,23 @@ jobs:
                 -DBUILD_STATIC=ON \
                 ..
           make
-          # Example packaging command; adjust according to your packaging scripts
+          # Create package metadata
+          mkdir -p pkg/APKBUILD
+          cat > pkg/APKBUILD/APKBUILD << EOF
+          # Contributor: Maintainer <maintainer@example.com>
+          # Maintainer: Maintainer <maintainer@example.com>
+          pkgname=cpu-check
+          pkgver=${{ env.PKG_VERSION }}
+          pkgrel=${{ env.PKG_RELEASE }}
+          pkgdesc="CPU validation and stress testing tool"
+          url="https://github.com/google/cpu-check"
+          arch="x86_64"
+          license="Apache-2.0"
+          depends=""
+          makedepends="cmake clang llvm linux-headers zlib-dev zlib-static openssl-dev openssl-libs-static musl-dev"
+          source=""
+          options="!check"
+          EOF
           make apk
 
       - name: Upload cpu-check Alpine Package