Update model configuration and fix tokenizer files; remove outdated model binary

Add model and configuration files; implement GPT-2 tokenizer and model initialization in main.py

Add model files and tokenizer configuration; include special tokens and initialization settings

Refactor poem generation logic; implement lazy loading for model and update request/response models

Refactor FastAPI application structure; implement CORS middleware, update model initialization, and enhance poem generation endpoint with new request and response models