Collect and analyze test results

[FedericoRubbi]

• [x] implement simulation data loading module (metrics and parameters)
• [x] write plotter and table creator module
• [ ] define all plots and tables (add mean and variances accordingly)
  • [x] server metrics | rounds
  • [ ] clients metrics | rounds
  • [ ] round clients | rounds
  • [ ] dataset size distribution | clients
  • [ ] losses metrics (SymBa, FF, ...) | rounds
  • [ ] clients metrics distribution at specific round | client
  • [ ] server/clients/round clients FF and BP metrics | rounds

[Congiuntivo]

Log global evaluation metrics