nmatheg v 2.0

[zaidalyafeai]

• fix tokenizer save vs. save_model
• merge the logic of finetune and pretrain

{'WordTokenizer': {'10000': {'off-eval-ar': {'birnn': {'loss': [0.6514959335327148],
     'precision': [0.5062719851330723],
     'recall': [0.5004618023485948],
     'f1': [0.454612213786187],
     'accuracy': [0.7950155763239876]}}}}}

vs.

{'UBC-NLP/MARBERTv2': {'off-eval-ar': {'loss': [0.4560829699039459],
   'precision': [0.4009345794392523],
   'recall': [0.5],
   'f1': [0.44502074688796683],
   'accuracy': [0.8018691588785046]}}}

• prevent data leakage between different runs/models
• test multiple tasks