ci: add workflow on issue opened

Author: vojtechmares

.github/workflows/issue.yml

@@ -0,0 +1,20 @@
+name: Comment on issue
+
+on:
+  issues:
+    types: [opened]
+
+jobs:
+  comment:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - uses: actions/github-script@v7
+        with:
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: '👋 Thanks for reporting!'
+            })