feat(docs): automate model download and configuration

- Add scripts to download models and update configuration file
- Remove manual steps for modifying model paths
- Update documentation for both ModelScope and HuggingFace model downloads
- Improve user experience by automating the entire process

docs/how_to_download_models_en.md

@@ -12,7 +12,7 @@ python download_models_hf.py
 ```
 The Python script will automatically download the model files and configure the model directory in the configuration file.
 
-
+The configuration file can be found in the user directory, with the filename `magic-pdf.json`.
 
 # How to update models previously downloaded