chore: add CI

.github/workflows/pr.yml

@@ -0,0 +1,25 @@
+name: CI
+on:
+  push:
+    branches:
+      - master
+      - main
+  pull_request:
+
+jobs:
+  build:
+    name: Build
+    strategy:
+      matrix:
+        go-version: [stable, oldstable]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Build gofmt
+        run: go build ./gofmt
+      - name: Build goimports
+        run: go build ./goimports