feat: Add enforce-linking-issues workflow

.github/workflows/enforce-linking-issues.yml

@@ -0,0 +1,63 @@
+name: Enforce linking issues to pull requests
+
+on:
+  pull_request:
+    types: [opened, edited, labeled]
+  workflow_call:
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  main:
+    name: Check if pull request has a linked issue
+    runs-on: ubuntu-latest
+    steps:
+      - name: Count closing issue references
+        id: has-closing-issue
+        uses: actions/github-script@v7
+        with:
+          result-encoding: string
+          script: |
+            const query = `query ($owner: String!, $name: String!, $number: Int!) {
+              repository(owner: $owner, name: $name) {
+                pullRequest(number: $number) {
+                  closingIssuesReferences(first: 100) {
+                    totalCount
+                  }
+                }
+              }
+            }`;
+
+            const reply = await github.graphql(query, {
+              owner: context.repo.owner,
+              name: context.repo.repo,
+              number: context.payload.pull_request.number
+            });
+
+            return reply
+              .repository
+              .pullRequest
+              .closingIssuesReferences
+              .totalCount > 0;
+
+      - if: ${{ steps.has-closing-issue.outputs.result != 'true' }}
+        name: Suggest that the contributor linked an issue
+        uses: actions/github-script@v7
+        with:
+          github-token: ${{ secrets.TOKEN_BOT_WORKFLOW }}
+          script: |
+            const login = "${{ github.event.pull_request.user.login }}";
+            const syntaxUrl = "https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue";
+            const message = `@${login} Please consider linking this pull request to an issue using \`Closes #ISSUE-NUMBER\` [syntax](syntaxUrl), \
+            especially if this pull request contains a bugfix, an enchancement or a new feature.`;
+
+            github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.payload.pull_request.number,
+              body: message,
+            });
+
+            core.setFailed("This pull request has no linked issue")