✨ feat(GenerationContext.py): add support for captioning engine in the GenerationContext class
The import statement for the `moviepy.editor` module is changed to `moviepy.editor as mp` to improve code readability. Additionally, the `gradio` module is imported as `gr` to improve code readability. The `GenerationContext` class now includes a `captioningengine` parameter and initializes a `captioningengine` attribute. The `setup_dir` method is modified to include a call to create a directory for the output files. The `get_file_path` method is modified to return the file path based on the output directory. The `process` method is modified to include additional steps for captioning. The `timed_script` attribute is added to store the result of the `ttsengine.synthesize` method. The `captioningengine` is used to generate captions and store them in the `captions` attribute. The final video is rendered using the `moviepy` library and saved as "final.mp4" in the output directory.
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
