ci: add release workflow for tagged builds

Author: BrainBuzzer

.github/workflows/release.yml

@@ -0,0 +1,71 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*"
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    name: Build (${{ matrix.target }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-gnu
+          - os: macos-latest
+            target: x86_64-apple-darwin
+          - os: windows-latest
+            target: x86_64-pc-windows-msvc
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.target }}
+
+      - name: Rust cache
+        uses: Swatinem/rust-cache@v2
+
+      - name: Build
+        run: cargo build --locked --release --target ${{ matrix.target }}
+
+      - name: Package artifact
+        shell: bash
+        run: |
+          mkdir -p dist
+          if [ "${{ runner.os }}" = "Windows" ]; then
+            cp target/${{ matrix.target }}/release/sx.exe dist/sx-${{ github.ref_name }}-${{ matrix.target }}.exe
+          else
+            cp target/${{ matrix.target }}/release/sx dist/sx-${{ github.ref_name }}-${{ matrix.target }}
+          fi
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: sx-${{ matrix.target }}
+          path: dist
+
+  publish:
+    name: Publish release
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: dist
+          merge-multiple: true
+
+      - name: Publish GitHub release
+        uses: softprops/action-gh-release@v2
+        with:
+          generate_release_notes: true
+          files: dist/*