Add automatic GitHub Release creation with multi-platform builds for semantic version tags

.github/workflows/release.yml

@@ -0,0 +1,80 @@
+---
+name: Create Release
+
+'on':
+  push:
+    tags:
+      - '[0-9]+.[0-9]+.[0-9]+'
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Configure CMake
+        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=Release
+
+      - name: Build
+        run: cmake --build build --config Release
+
+      - name: Prepare Linux artifact
+        if: runner.os == 'Linux'
+        env:
+          TAG: ${{ github.ref_name }}
+        run: |
+          mkdir -p artifacts
+          cp build/cpp_calc artifacts/cpp_calc-linux-$TAG
+          chmod +x artifacts/cpp_calc-linux-$TAG
+
+      - name: Prepare macOS artifact
+        if: runner.os == 'macOS'
+        env:
+          TAG: ${{ github.ref_name }}
+        run: |
+          mkdir -p artifacts
+          cp build/cpp_calc artifacts/cpp_calc-macos-$TAG
+          chmod +x artifacts/cpp_calc-macos-$TAG
+
+      - name: Prepare Windows artifact
+        if: runner.os == 'Windows'
+        env:
+          TAG: ${{ github.ref_name }}
+        run: |
+          mkdir -p artifacts
+          copy build\Release\cpp_calc.exe `
+            artifacts\cpp_calc-windows-$env:TAG.exe
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: cpp_calc-${{ runner.os }}
+          path: artifacts/*
+
+  release:
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+
+      - name: Create Release
+        uses: softprops/action-gh-release@v1
+        with:
+          name: Release ${{ github.ref_name }}
+          draft: false
+          prerelease: false
+          generate_release_notes: true
+          files: artifacts/**/*