ci: add minimal smoke workflow (ubuntu/windows/macos) to diagnose startup failures

Author: riatzukiza

.github/workflows/ci-smoke.yml

@@ -0,0 +1,32 @@
+name: ci-smoke
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+permissions: {}
+
+jobs:
+  smoke-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Print context
+        run: |
+          echo "event=$GITHUB_EVENT_NAME"
+          echo "actor=$GITHUB_ACTOR"
+          echo "ref=$GITHUB_REF"
+          echo "sha=$GITHUB_SHA"
+      - name: Hello
+        run: echo hello from ubuntu
+
+  smoke-windows:
+    runs-on: windows-latest
+    steps:
+      - name: Hello
+        run: echo hello from windows
+
+  smoke-macos:
+    runs-on: macos-latest
+    steps:
+      - name: Hello
+        run: echo hello from macos