ci: add release workflow for tagged builds

Author: nightowlnerd

.github/workflows/release.yml

@@ -0,0 +1,96 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*"
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    name: Build (${{ matrix.name }})
+    runs-on: ${{ matrix.runner }}
+    timeout-minutes: 40
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: macos-arm64
+            runner: macos-latest
+            target: aarch64-apple-darwin
+            artifact_name: slipstream-macos-arm64
+          - name: linux-x86_64
+            runner: ubuntu-latest
+            target: x86_64-unknown-linux-gnu
+            artifact_name: slipstream-linux-x86_64
+    steps:
+      - name: Check out
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install build dependencies (Linux)
+        if: runner.os == 'Linux'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y cmake pkg-config libssl-dev python3
+
+      - name: Install build dependencies (macOS)
+        if: runner.os == 'macOS'
+        run: |
+          brew install cmake pkg-config openssl@3
+          echo "OPENSSL_ROOT_DIR=$(brew --prefix openssl@3)" >> "$GITHUB_ENV"
+          echo "PKG_CONFIG_PATH=$(brew --prefix openssl@3)/lib/pkgconfig" >> "$GITHUB_ENV"
+
+      - name: Set up Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.target }}
+
+      - name: Build
+        run: |
+          cargo build -p slipstream-client --release --target ${{ matrix.target }}
+          cargo build -p slipstream-server --release --target ${{ matrix.target }}
+
+      - name: Package
+        shell: bash
+        run: |
+          set -euo pipefail
+          base="${{ matrix.artifact_name }}"
+          bin_dir="target/${{ matrix.target }}/release"
+          mkdir -p dist
+          cp "${bin_dir}/slipstream-client" dist/
+          cp "${bin_dir}/slipstream-server" dist/
+          tar -czf "${base}.tar.gz" -C dist slipstream-client slipstream-server
+          if command -v sha256sum >/dev/null 2>&1; then
+            sha256sum "${base}.tar.gz" > "${base}.tar.gz.sha256"
+          else
+            shasum -a 256 "${base}.tar.gz" > "${base}.tar.gz.sha256"
+          fi
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.artifact_name }}
+          path: |
+            *.tar.gz
+            *.sha256
+
+  release:
+    name: Create Release
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+          merge-multiple: true
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          generate_release_notes: true
+          files: artifacts/*