modify readme.md

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.

Add Chinese translations to the feature request issue template to enhance
accessibility for Chinese-speaking users and facilitate their contributionto the project.

Add Chinese translations to the bug report issue template to improve accessibility
for Chinese-speaking users and make it easier for them to contribute to the project.

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 ci

add data