Add nightly macos arm64 breakage test (#263)

.github/workflows/breakage-against-macOS-arm64-ponyc-latest.yml

@@ -0,0 +1,31 @@
+name: arm64 macOS ponyc update breakage test
+
+on:
+  repository_dispatch:
+    types: [ponyc-arm64-macos-nightly-released]
+
+jobs:
+  macos:
+    name: Verify main against the latest ponyc on macOS
+    runs-on: macos-14
+    steps:
+      - uses: actions/checkout@v3
+      - name: install ponyc
+        run: bash .ci-scripts/macOS-arm64-install-pony-tools.bash nightly
+      - name: brew install dependencies
+        run: brew install coreutils
+      - name: Test with most recent ponyc release
+        run: |
+          export PATH="/tmp/ponyc/bin/:$PATH"
+          make unit-tests config=debug
+      - name: Send alert on failure
+        if: ${{ failure() }}
+        uses: zulip/github-actions-zulip/send-message@b62d5a0e48a4d984ea4fce5dd65ba691963d4db4
+        with:
+          api-key: ${{ secrets.ZULIP_SCHEDULED_JOB_FAILURE_API_KEY }}
+          email: ${{ secrets.ZULIP_SCHEDULED_JOB_FAILURE_EMAIL }}
+          organization-url: 'https://ponylang.zulipchat.com/'
+          to: notifications
+          type: stream
+          topic: ${{ github.repository }} scheduled job failure
+          content: ${{ github.server_url}}/${{ github.repository }}/actions/runs/${{ github.run_id }} failed.