Update model configuration and fix tokenizer files; remove outdated model binary

Add initial log entries for model initialization and loading status

Add model configuration and improve model initialization in ModelManager

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

Fix logging issues in poetry_generation.log; add warnings for custom vocabulary loading and model file not found errors, and ensure BASE_MODEL_DIR ends with a slash

Refactor logging setup in main.py; improve file handler configuration with fallback to stdout and update model path