Add github ci action

.github/workflows/ci.yaml

@@ -0,0 +1,42 @@
+name: ci
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+
+      - name: setup-zig
+        uses: mlugg/setup-zig@v1
+        with:
+          version: 0.13.0
+
+      - name: lint
+        run: |
+          zig fmt --check src/ build.zig build.zig.zon
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+
+      - name: setup-zig
+        uses: mlugg/setup-zig@v1
+        with:
+          version: 0.13.0
+
+      - name: build
+        run: zig build test