Add github actions

Author: rauhul

.github/workflows/build.yml

@@ -1,5 +1,14 @@
 name: Build ESP Examples
 
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+  schedule:
+    # Build on Mondays at 9am PST every week
+    - cron:  '0 17 * * 1'
+
 jobs:
   build:
     runs-on: ubuntu-24.04