switch workflow to just test

.github/workflows/test-showbridge.yaml

@@ -0,0 +1,29 @@
+name: Test showbridge
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  build-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install alsa
+        run: sudo apt-get install -y libasound2-dev
+
+      - uses: actions/checkout@v6
+      - uses: actions/setup-go@v6
+        with:
+          go-version-file: 'go.mod'
+      - name: mod tidy
+        run: go mod tidy
+
+      - name: run tests
+        run: go test ./...