GitLab

* feat: refractor cli command

* feat: add docs to describe the output files of cli

* feat: resove review comments

* feat: updat docs about middle.json

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Co-authored-by: shenguanlin <shenguanlin@pjlab.org.cn>

fix(pdf_extract_kit): specify utf-8 encoding when reading model configEnsure the model configuration file is read with utf-8 encoding to support
non-ASCII characters and prevent potential encoding errors.

Specify utf-8 encoding when opening the configuration file to ensure
compatibility with files containing non-ASCII characters, avoiding potentialencoding errors.

fix(magic-pdf): add default values and improve warning logs for config optionsEnsure that 'temp-output-dir', 'models-dir', and 'device-mode' have sensible default
values in case they are not specified in the config file.

Improve the model loading mechanism in magic_pdf by implementing a Singleton
pattern to reduce redundant model instantiation. Additionally, enhance the
command-line interface to support input from list files, allowing batch
processing of multiple PDF documents.

Introduce a Singleton pattern to manage custom models in the magic_pdf module.
This change improves the efficiency by ensuring that a single instance of the
custom model is created and reused, thereby reducing the overhead of multiple
instantiate calls for the same model configuration.

Add new configuration options for custom model directories and device modeselection. This allows users to specify the directory where models are stored
and choose between CPU and GPU modes for model inference. The configurations
are read from a JSON file and can be easily extended to support additional
options in the future.