Add GitHub Action

.github/workflows/ci.yaml

@@ -0,0 +1,39 @@
+name: Continuous Integration
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+  workflow_dispatch:
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        zig-version: ["0.13.0"]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        include:
+          - zig-version: "0.12.1"
+            os: ubuntu-latest
+          - zig-version: "master"
+            os: ubuntu-latest
+
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Zig
+        uses: mlugg/setup-zig@v1
+        with:
+          version: ${{ matrix.zig-version }}
+
+      - name: Build
+        run: zig build --summary all
+
+      - name: Run tests
+        run: zig build test --summary all