create few shot scripts & refactor project

modules/data_generator/training_dataset_generator.py

modules/llm/GPT-4/GPT-4_few_shot.py

modules/llm/GPT-4/GPT-4_zero_shot.py

modules/llm/Mistral-7b/Mistral-7b_few_shot.py

modules/llm/Mistral-7b/Mistral-7b_zero_shot.py

modules/llm/Mixtral-8x7b/Mixtral-8x7b_few_shot.py

modules/llm/Mixtral-8x7b/Mixtral-8x7b_zero_shot.py

modules/llm/utils.py