added precision, recall, F1

I added precision, recall, F1 to the metrics.

Now we need some meta functions to wrap everything for having all the scores (IoU, F1, precision, recall) in a model evaluation step. But I'm not deep enough in the code to know where to place this.

Code from: https://medium.com/@nghihuynh_37300/understanding-evaluation-metrics-in-medical-image-segmentation-d289a373a3f useful reading: https://www.kaggle.com/code/yassinealouini/all-the-segmentation-metrics