add pdf-mineru

[fangqiluxatu]

添加了基于MinerU的PDF转Markdown接口服务，调用方式与pdf-marker一致，开箱即用。

[gru-agent]

TestGru Assignment

Summary

Link	CommitId	Status	Reason
Detail	9461c59	🚫 Skipped	No files need to be tested {"plugins/model/pdf-mineru/Readme.md":"target file(plugins/model/pdf-mineru/Readme.md) not in work scope \n include: projects/app/src//*.ts \n exclude: node_modules,/.test.ts,**/.test.tsx,/*.spec.ts,/.spec.tsx,**/.d.ts,/*.test.js,/.spec.js","plugins/model/pdf-mineru/pdf_parser_mineru.py":"target file(plugins/model/pdf-mineru/pdf_parser_mineru.py) not in work scope \n include: projects/app/src/**/.ts \n exclude: node_modules,/*.test.ts,/.test.tsx,**/.spec.ts,/*.spec.tsx,/.d.ts,**/.test.js,**/*.spec.js"}

Tip

You can @gru-agent and leave your feedback. TestGru will make adjustments based on your input

[cla-assistant]

All committers have signed the CLA.

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[c121914yu]

🤖 Generated by deploy action

📦 Preview Image: ghcr.io/labring/fastgpt-pr:bb3cb8c25da5177343c32ebf8657a021b0238a43