feat(ci): Add cron job to run at night every 2 hours

Author: peter-marcisovsky

.github/workflows/build_and_run_main_ci.yml

@@ -7,6 +7,11 @@
 name: Build and Run Test apps
 
 on:
+  schedule:
+    - cron: "0 0 * * *"   # 00:00 UTC
+    - cron: "0 2 * * *"   # 02:00 UTC
+    - cron: "0 4 * * *"   # 04:00 UTC
+    - cron: "0 6 * * *"   # 06:00 UTC
   pull_request:
     types: [opened, reopened, synchronize]