chore: import upstream snapshot with attribution

.github/workflows/closing-pr.js

@@ -0,0 +1,37 @@
+const { getCloseReason } = require("./auto-close-pr.js");
+
+module.exports = async ({ context, github }) => {
+  const closeReason = await getCloseReason({ github, context });
+  if (closeReason) {
+    console.log("PR will be auto-closed. Skipping labeling.");
+    return;
+  }
+
+  const { owner, repo } = context.repo;
+  const number = context.payload.pull_request.number;
+
+  const result = await github.graphql(
+    `query($owner: String!, $repo: String!, $number: Int!) {
+      repository(owner: $owner, name: $repo) {
+        pullRequest(number: $number) {
+          closingIssuesReferences(first: 10) {
+            nodes {
+              number
+            }
+          }
+        }
+      }
+    }`,
+    { owner, repo, number }
+  );
+
+  const issues = result.repository.pullRequest.closingIssuesReferences.nodes;
+  for (const { number: issue_number } of issues) {
+    await github.rest.issues.addLabels({
+      owner,
+      repo,
+      issue_number,
+      labels: ["has-closing-pr"],
+    });
+  }
+};