Added GitHub workflow to build the sample project.

Author: pvginkel

.github/workflows/build_examples_esp_idf_project.yml

@@ -0,0 +1,21 @@
+name: Build ESP-IDF example project
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: esp-idf build
+        uses: espressif/esp-idf-ci-action@v1
+        with:
+          esp_idf_version: v5.3.2
+          target: esp32
+          path: examples/ESPIDFExample