chore(CI): add slack notifications

.github/workflows/daily_ci.yml

@@ -84,3 +84,27 @@ jobs:
     uses: ./.github/workflows/library_legacy_interop_test_vectors.yml
     with:
       dafny: ${{needs.getVersion.outputs.version}}
+
+  notify:
+    needs:
+      [
+        getVersion,
+        getVerifyVersion,
+        getFormatVersion,
+        pr-ci-format,
+        daily-ci-codegen,
+        daily-ci-verification,
+        daily-ci-net,
+        daily-ci-rust,
+        daily-ci-go,
+        daily-ci-interop-tests,
+        daily-dafny-keyring-test-vectors,
+        pr-dafny-mkp-keyring-legacy-test-vectors,
+        daily-dafny-legacy-test-vectors,
+      ]
+    if: ${{ failure() }}
+    uses: aws/aws-cryptographic-material-providers-library/.github/workflows/slack-notification.yml@main
+    with:
+      message: "Daily CI failed on `${{ github.repository }}`. View run: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+    secrets:
+      SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL_CI }}

.github/workflows/issue-notification.yml

@@ -0,0 +1,23 @@
+name: Issue Created Notification
+on:
+  issues:
+    types: [opened, reopened]
+  issue_comment:
+    types: [created]
+
+jobs:
+  notify-issue:
+    if: github.event_name == 'issues'
+    uses: aws/aws-cryptographic-material-providers-library/.github/workflows/slack-notification.yml@main
+    with:
+      message: "New github issue `${{ github.event.issue.title }}`. Link: ${{ github.event.issue.html_url }}"
+    secrets:
+      SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL_GHI }}
+
+  notify-comment:
+    if: github.event_name == 'issue_comment' && !github.event.issue.pull_request
+    uses: aws/aws-cryptographic-material-providers-library/.github/workflows/slack-notification.yml@main
+    with:
+      message: "New comment on issue `${{ github.event.issue.title }}`. Link: ${{ github.event.comment.html_url }}"
+    secrets:
+      SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL_GHI }}