[RN][CI] Add ci job to check if nightly succeeded

.github/workflows/check-nightly.yml

@@ -0,0 +1,26 @@
+name: Check Nigthlies
+description: This jobs runs every day 2 hours after the nightly job and its purpose is to report a failure in case the nightly failed to be published. We are going to hook this to an internal automation.
+
+on:
+  workflow_dispatch:
+  pull_request: # Remove this after testing
+  # nightly build @ 4:15 AM UTC
+  schedule:
+    - cron: '15 4 * * *'
+
+jobs:
+  check-nightly:
+    runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
+    steps:
+      - name: Check nightly
+      - run: |
+          TODAY=$(date "+%Y%m%d")
+          echo "Checking nightly for $TODAY"
+          NIGHTLY="$(npm view react-native | grep $TODAY)"
+          if [[ -z $NIGHTLY ]]; then
+            echo 'No nightly'
+            exit 1
+          else
+            echo 'Nightly Worked, All Good!'
+          fi