Create community_greetings.yml

Added community greetings

.github/workflows/community_greetings.yml

@@ -0,0 +1,16 @@
+name: community | Greetings
+
+on: [pull_request, issues]
+
+jobs:
+  greeting:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/first-interaction@v1
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        pr-message:  'Hello @${{ github.actor }}, thank you for submitting a PR! We will respond as soon as possible.'
+        issue-message: |
+          Hello @${{ github.actor }}, thank you for your interest in our work!
+
+          If this is a bug report, please provide screenshots and **minimum viable code to reproduce your issue**, otherwise we can not help you.