feat(GenerationContext.py): add setup_dir method to create a directory for output files with a timestamp
feat(GenerationContext.py): call setup_dir method before generating script and synthesizing audio to ensure output directory exists
feat(prompts/fix_captions.yaml): add a new prompt file to provide instructions for fixing captions
fix(BaseTTSEngine.py): add force_duration method to adjust audio clip duration if it exceeds a specified duration
feat(CoquiTTSEngine.py): add options for forcing duration and specifying duration in the UI
feat(utils/prompting.py): add get_prompt function to load prompt files from a specified location
fix(gradio_ui.py): set equal_height=True for engine_rows to ensure consistent height for engine options
