Display 5 worst predictions at the end of evaluation

Based on !339 (merged)

Closes #245 (closed)

dan/ocr/manager/metrics.py

@@ -164,7 +164,6 @@ class MetricManager:
             metrics["time"] = [values["time"]]
 
         gt, prediction = values["str_y"], values["str_x"]
-
         for metric_name in metric_names:
             match metric_name:
                 case (