test: probe shopware-cli command syntax on the real runner

.gitea/workflows/swcli-probe.yml

@@ -0,0 +1,37 @@
+name: swcli-probe
+on:
+  push:
+    branches: [ci/shopware-cli-probe]
+
+jobs:
+  probe:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install shopware-cli
+        run: |
+          curl -sL -o /usr/local/bin/shopware-cli \
+            https://github.com/shopware/shopware-cli/releases/latest/download/shopware-cli-linux-amd64
+          chmod +x /usr/local/bin/shopware-cli
+          shopware-cli --version
+
+      - name: Probe extension command help
+        run: |
+          echo "=== extension --help ==="
+          shopware-cli extension --help || true
+          echo "=== extension package --help ==="
+          shopware-cli extension package --help || true
+          echo "=== extension zip --help (check if still a deprecated alias) ==="
+          shopware-cli extension zip --help || true
+          echo "=== extension validate --help ==="
+          shopware-cli extension validate --help || true
+
+      - name: Try validate against this repo
+        run: shopware-cli extension validate . || true
+
+      - name: Try packaging this repo
+        run: |
+          shopware-cli extension package . --output .build || true
+          echo "=== .build contents ==="
+          ls -la .build || true