ci: add blocked/needs-repro issues-helper (#35605)

.github/workflows/issue-labeled.yml

@@ -0,0 +1,24 @@
+name: Issue Labeled
+
+on:
+  issues:
+    types: [labeled]
+
+jobs:
+  issue-labeled:
+    runs-on: ubuntu-latest
+    steps:
+      - name: blocked/need-repro
+        if: github.event.label.name == 'blocked/need-repro'
+        uses: actions-cool/issues-helper@dad28fdb88da5f082c04659b7373d85790f9b135 # v3.3.0
+        with:
+          actions: 'create-comment'
+          body: |
+            Hello @${{ github.event.issue.user.login }}. Thanks for reporting this and helping to make Electron better!
+
+            Would it be possible for you to make a standalone testcase with only the code necessary to reproduce the issue? For example, [Electron Fiddle](https://www.electronjs.org/fiddle) is a great tool for making small test cases and makes it easy to publish your test case to a [gist](https://gist.github.com) that Electron maintainers can use.
+
+            Stand-alone test cases make fixing issues go more smoothly: it ensure everyone's looking at the same issue, it removes all unnecessary variables from the equation, and it can also provide the basis for automated regression tests. 
+
+            Now adding the `blocked/need-repro` label for this reason. After you make a test case, please link to it in a followup comment. This issue will be closed in 10 days if the above is not addressed.
+