[update] README

Author: dianjixz

README.md

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   StackFlow is a simple, fast, and elegant one-stop AI service infrastructure project aimed at embedded developers. Its purpose is to enable Makers and Hackers to quickly obtain powerful AI acceleration capabilities in current embedded devices. StackFlow can infuse a wise soul into various human-machine interaction devices.
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 ## Table of Contents

README_zh.md

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   StackFlow 是一个简单、疾速、优雅的面向嵌入式开发者一站式 AI 服务基础设施项目，目的是让 Maker 和 Haker 们能够快速的在当前的嵌入式设备中获取到强大的 AI 加速能力。StackFlow 能够为各类人机交互设备注入智慧的灵魂。
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