build: add GH actions workflow for CI

Signed-off-by: deadprogram <[email protected]>

.github/workflows/test.yaml

@@ -0,0 +1,15 @@
+name: Go test
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.20.x # or later
+      - name: Test
+        run: go test ./...