Added a GitHub action for the ESP-IDF project.

.github/workflows/build_examples_esp_idf_project.yml

@@ -0,0 +1,23 @@
+name: Build examples for an ESP-IDF project
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+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: extras/idf_project_example
+