[tests] Add tests for examples (#9403)

These tests will run if one of the conditions is met:

- any change to `./examples`
- any changes to `./packages/frameworks`

The test ensures that examples can build and deploy without errors.

In a future PR, we could improve these tests to make requests to the
test deployment (like we do for probes).

examples/ionic-react/package.json

@@ -2,6 +2,9 @@
   "name": "ionic-react",
   "version": "0.0.1",
   "private": true,
+  "engines": {
+    "node": "16.x"
+  },
   "dependencies": {
     "@ionic/react": "^4.11.0",
     "@ionic/react-router": "^4.11.0",