Add tmate session setup to copilot-test-tools.yml

Author: austenstone

.github/workflows/copilot-test-tools.yml

@@ -34,4 +34,5 @@ jobs:
             list all your tools.
       - run: |
           cat ~/.copilot/mcp-config.json
-          
+              - name: Setup tmate session
+      - uses: mxschmitt/action-tmate@v3