feat: Added greetings Action.

Signed-off-by: Guennadi Maximov C <g.maxc.fox@protonmail.com>

Author: DrKJeff16

.github/workflows/greetings.yml

@@ -0,0 +1,35 @@
+name: Greetings
+
+on:
+  pull_request:
+    types:
+      - opened
+  issues:
+    types:
+      - opened
+
+jobs:
+  greet:
+    name: Greet First-Time Contributors
+    runs-on: ubuntu-latest
+
+    permissions:
+      issues: write
+      pull-requests: write
+
+    steps:
+      - uses: actions/first-interaction@v2.0.0
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          issue-message: |
+            ## Automated Greeting
+
+            Thank you for your feedback!
+
+            Your issue will be adressed **ASAP**.
+          pr-message: |
+            ## Automated Greeting
+
+            Many many thanks for your contributions!
+
+            Your PR will be checked **ASAP**.