feat: uhm, i changed some things

CNN-model/trainers/trainer.py

@@ -0,0 +1,22 @@
+from abc import ABC, abstractmethod
+from typing import Callable
+
+import torch
+import torch.nn as nn
+from torch.utils.data import DataLoader
+
+
+class Trainer(ABC):
+    """Abstract class for trainers."""
+
+    @abstractmethod
+    def execute(
+            self,
+            model: nn.Module | None,
+            train_loader: DataLoader,
+            validation_loader: DataLoader,
+            loss_fn: Callable[[torch.Tensor, torch.Tensor], torch.Tensor],
+            n_epochs: int,
+            device: str
+    ) -> None:
+        pass