feat: Add Branch Update Reminder as PR Comment

Author: eramitgupta

.github/workflows/lint.yml

@@ -97,3 +97,32 @@ jobs:
               repo: context.repo.repo,
               body: output
             })
+
+      - name: Alert for Forked Repositories
+        if: github.event.pull_request.head.repo.fork == true
+        uses: actions/github-script@v6
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const output = `
+            ## ⚠️ This PR is from a Forked Repository
+
+            Your branch is from a **forked repository**, and it might be outdated compared to the \`main\` branch.
+
+            Please make sure you have the latest updates from \`main\` before merging.
+
+            Run the following commands:
+            \`\`\`sh
+            git remote add upstream https://github.com/${{ github.repository_owner }}/${{ github.event.repository.name }}.git
+            git fetch upstream
+            git merge upstream/main
+            git push origin HEAD
+            \`\`\`
+            `;
+
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: output
+            })