adding greetings

.github/workflows/greetings.yml

@@ -0,0 +1,25 @@
+name: Greetings
+
+on: [pull_request_target, issues]
+
+jobs:
+  greeting:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+    - uses: actions/first-interaction@v1
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        issue-message: |
+          Hello! Thank you for filing an issue.
+
+            If this is a bug report, please include relevant logs to help us debug the problem (OS, MLX version, drivers installed, GPU type and vendor, ...)
+        pr-message: |
+            Hello! Thank you for your contribution.
+
+            If you are fixing a bug, please reference the issue number in the description.
+
+            If you are implementing a feature request, please explain all your changes in your pull request.
+