ci: add issue title check (envoyproxy#273)

**Commit Message**

This introduces a new GitHub Actions workflow to check the length of
issue titles and provide feedback if they exceed a specified limit.

**Related Issues/PRs (if applicable)**

Fixes envoyproxy#270

---------

Signed-off-by: soma00333 <soma03432303@gmail.com>
Signed-off-by: Loong <long0dai@foxmail.com>

.github/workflows/issue_title_check.yaml

@@ -0,0 +1,36 @@
+name: Issue Title Check
+
+on:
+  issues:
+    types: [opened, edited]
+
+permissions:
+  issues: write
+
+jobs:
+  check_title_length:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check Issue Title Length
+        uses: actions/github-script@v6
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const issueNumber = context.issue.number;
+            const repoOwner = context.repo.owner;
+            const repoName = context.repo.repo;
+
+            const issueTitle = context.payload.issue.title;
+            const length = issueTitle.length;
+
+            console.log(`Title: ${issueTitle}`);
+            console.log(`Length: ${length}`);
+
+            if (length >= 60) {
+              await github.rest.issues.createComment({
+                owner: repoOwner,
+                repo: repoName,
+                issue_number: issueNumber,
+                body: "The issue title is too long (over 60 characters). Please shorten it and ensure it is well summarized."
+              });
+            }