chore: add relator (#623)

Co-authored-by: Sehat1137 <Sehat1137@users.noreply.github.com>

Author: Sehat1137

.github/workflows/relator.yml

@@ -0,0 +1,27 @@
+name: Relator
+
+on:
+  issues:
+    types: [opened, reopened]
+  pull_request_target:
+    types: [opened, reopened] # zizmor: ignore[dangerous-triggers]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.issue.number || github.event.pull_request.number }}
+  cancel-in-progress: true
+
+permissions:
+  issues: read
+  pull-requests: read
+
+jobs:
+  notify:
+    name: "Telegram notification"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Send Telegram notification for new issue or pull request
+        uses: reagento/relator@4b1531359edba1228db0906e8931b0da2aef69cd # v1.7.0
+        with:
+          tg-bot-token: ${{ secrets.TELEGRAM_BOT_TOKEN }}
+          tg-chat-id: ${{ vars.TELEGRAM_CHAT_ID }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}