ci: add ci

.github/workflows/tests.yaml

@@ -0,0 +1,21 @@
+name: Unit tests
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+      - name: Install dependencies
+        run: go get ./...
+      - name: Run unit tests
+        run: go test ./...