Labels and greetings Github workflows

.github/workflows/greetings.yml

@@ -0,0 +1,11 @@
+name: Greetings
+on: [pull_request, issues]
+jobs:
+  greeting:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/first-interaction@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          issue-message: 'Thanks for creating your first issue :+1:\nFeel free to use [Slack](https://join.slack.com/t/qdm12/shared_invite/enQtODMwMDQyMTAxMjY1LTU1YjE1MTVhNTBmNTViNzJiZmQwZWRmMDhhZjEyNjVhZGM4YmIxOTMxOTYzN2U0N2U2YjQ2MDk3YmYxN2NiNTc) if you just need some quick help or want to chat'
+          pr-message: 'Thank you so much for contributing, that means a lot to me :wink:'