add smoke workflow

.gitea/workflows/smoke.yml

@@ -0,0 +1,25 @@
+name: Smoke test
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  hello:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Show context
+        run: |
+          echo "Hello from Gitea Actions on $(hostname)"
+          echo "Runner OS: $RUNNER_OS"
+          uname -a
+          node --version || true
+          docker --version || true
+
+  php-wp:
+    runs-on: php-wp
+    steps:
+      - name: Check WP-CLI / PHP
+        run: |
+          php --version
+          wp --info --allow-root || true