add nightly test template

.github/workflows/nightly.yml

@@ -0,0 +1,20 @@
+name: Run nightly tests
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  run-tests:
+    runs-on: cloud
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: '1.23'
+
+    - name: Test
+      working-directory: ./src
+      run: go test -v --short ./...