Add debug config for timer_test

haversine_02/.vscode/launch.json

@@ -30,6 +30,13 @@
             "args": [
                 "${workspaceFolder}/pairs.json"
             ]
+        },
+        {
+            "name": "Debug timer test",
+            "type": "cppdbg",
+            "request": "launch",
+            "cwd": "${workspaceFolder}",
+            "program": "${workspaceFolder}/timer_test"
         }
     ]
 }