fix(train): defer load_dotenv to main(),

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: hBouanane

src/darija_translator/cli.py

@@ -15,8 +15,6 @@
 from darija_translator.train import build_trainer, save_model
 from dotenv import load_dotenv
 
-load_dotenv()
-
 
 def prepare_data(dataset_name: str, data_config: DataConfig, tokenizer):
     dataset = load_dataset(dataset_name, split="train")