Testing and metric evaluation module

[Congiuntivo]

• [x] Decide a list of metrics to implement for BP (maintained list of metrics) @Congiuntivo
• [x] Decide a list of metrics to implement for FF (maintained list of metrics) @Congiuntivo
• [x] Implement the module for BP @Congiuntivo
• [x] Implement the module for FF @Congiuntivo

[Congiuntivo]

List of metrics

• [x] implement metrics
  • [x] implementation for FF
  • [x] implementation for BP
• [x] training metrics for every epoch
  • [x] for model bp
  • [x] for model ff
• [x] other metrics from here
  • [x] accuracy
  • [x] balanced accuracy
  • [x] f1 score
  • [x] recall
  • [x] precision