tests: add chromium example workflow

.github/workflows/example-chromium.yml

@@ -0,0 +1,41 @@
+name: example-chromium
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+
+  tests:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Chromium headless
+        uses: ./
+        with:
+          # Print information about the system and current environment
+          # including detected browsers
+          # which are pre-installed in GitHub-hosted runners
+          # see https://on.cypress.io/command-line#cypress-info
+          # We do not need the build parameter to build an app here
+          # because the remote https://example.cypress.io site
+          # is already built and running, and so for convenience
+          # we repurpose the build parameter to get cypress info instead.
+          build: npx cypress info
+          working-directory: examples/browser
+          browser: chromium
+          # As of Cypress v8.0 the `cypress run` command
+          # executes tests in `headless` mode by default
+
+      - name: Chromium headed
+        uses: ./
+        with:
+          # Cypress and dependencies are already installed
+          install: false
+          working-directory: examples/browser
+          browser: chromium
+          headed: true