Add Github action to ensure PR's have an associated issue

.github/workflows/pr-file-check.yml

@@ -3,11 +3,9 @@ name: PR files
 on:
   pull_request:
     types:
-      # On by default if you specify no types.
       - 'opened'
       - 'reopened'
       - 'synchronize'
-      # For `skip-label` only.
       - 'labeled'
       - 'unlabeled'
 
@@ -42,3 +40,15 @@ jobs:
             .github/test_plan.md
           skip-label: 'skip tests'
           failure-message: 'TypeScript code was edited without also editing a ${file-pattern} file; see the Testing page in our wiki on testing guidelines (the ${skip-label} label can be used to pass this check)'
+
+      - name: 'Ensure PR has an associated issue'
+        uses: actions/github-script@v6
+        with:
+          script: |
+            const labels = context.payload.pull_request.labels.map(label => label.name);
+            if (!labels.includes('skip-issue-check')) {
+              const issueLink = context.payload.pull_request.body.match(/https:\/\/github\.com\/\S+\/issues\/\d+/);
+              if (!issueLink) {
+                core.setFailed('No associated issue found in the PR description.');
+              }
+            }