Create ci workflow

.github/actions/setup/action.yml

@@ -0,0 +1,9 @@
+name: Setup
+
+runs:
+  using: composite
+  steps:
+    - uses: actions/setup-go@v4
+      with:
+        go-version-file: go.mod
+        cache: true

.github/workflows/ci.yml

@@ -0,0 +1,35 @@
+name: ci
+
+on:
+  push:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup
+        uses: ./.github/actions/setup
+      - name: Test
+        run: go test ./... -race -coverprofile=coverage.out -covermode=atomic
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup
+        uses: ./.github/actions/setup
+      - name: Build
+        run: go build .
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup
+        uses: ./.github/actions/setup
+      - name: Lint
+        uses: golangci/golangci-lint-action@v4