added welcome workflow

Author: FrancescoSaverioZuppichini

.github/workflows/issue_reply.yml

@@ -0,0 +1,14 @@
+on:
+  issues:
+    types: [opened]
+  pull_request_target:
+    types: [opened]
+  build:
+    name: 👋 Welcome
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/first-interaction@v1.1.1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          issue-message: "Hello there, thank you for opening an Issue ! 🙏🏻 The team was notified and they will get back to you asap."
+          pr-message:  "Hello there, thank you for opening an PR ! 🙏🏻 The team was notified and they will get back to you asap."