Add a github release workflow

.github/workflows/release.yml

@@ -0,0 +1,57 @@
+name: release
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            artifact: sandbox-linux-x86_64
+          - os: macos-latest
+            artifact: sandbox-macos-aarch64
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - uses: goto-bus-stop/setup-zig@v2
+        with:
+          version: 0.15.2
+
+      - name: Install X11 dependencies (Linux)
+        if: matrix.os == 'ubuntu-latest'
+        run: sudo apt-get update && sudo apt-get install -y libx11-dev libxcursor-dev libxrandr-dev libxinerama-dev libxi-dev libxext-dev libxfixes-dev libgl1-mesa-dev
+
+      - run: zig build -Doptimize=ReleaseFast
+
+      - run: mv zig-out/bin/sandbox ${{ matrix.artifact }}
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.artifact }}
+          path: ${{ matrix.artifact }}
+
+  release:
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+          merge-multiple: true
+
+      - run: chmod +x artifacts/*
+
+      - uses: softprops/action-gh-release@v2
+        with:
+          files: artifacts/*