Add README

Author: xia-mc

README.md

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+<div align="center">
+
+English | [简体中文](./README_CN.md)
+
+# PyFastUtil
+
+[//]: # (  <p>)
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+[//]: # (    <!--suppress CheckImageSize -->)
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+[//]: # (      <img src="./mascot.png" alt="Project Mascot" width="320">)
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+## Make Python Fast Again
+
+[![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](LICENSE)
+[![Issues](https://img.shields.io/github/issues/xia-mc/PyFastUtil)](https://img.shields.io/github/issues/Nova-Committee/CheatDetector)
+[![Build](https://github.com/xia-mc/PyFastUtil/actions/workflows/python-package.yml/badge.svg)](https://github.com/xia-mc/PyFastUtil/actions)
+
+</div>
+
+## Introduction
+
+**PyFastUtil** is a high-performance utility library for Python, inspired by the popular [FastUtil](https://fastutil.di.unimi.it/) library in Java. However, **PyFastUtil is not a Python binding of any existing library**, but a **complete re-implementation** from scratch, designed to bring the same efficiency and functionality to Python.
+
+> **Note**: PyFastUtil is still in its **early development phase**. The codebase is under active development and is not yet ready for production use. We are working hard to make it feature-complete and thoroughly tested before releasing it on PyPI.
+
+### Features
+
+- Implements all corresponding Python data structure interfaces, while providing significant performance improvements through targeted optimizations. Users can choose the most suitable data structure for their specific needs.
+- Fully implemented in C/C++, leveraging hardware-specific optimizations such as SIMD to maximize the performance of data structures.
+- Offers efficient Python bindings for certain C APIs, allowing advanced users to perform low-level, "unsafe" operations when needed.
+
+## Installation
+
+Currently, **PyFastUtil** is not available on PyPI. You will need to **clone the repository** and build it from the source code.
+
+### Build from source
+
+1. Clone the repository:
+    ```bash
+    git clone https://github.com/yourusername/PyFastUtil.git
+    cd PyFastUtil
+    ```
+
+2. Build the project:
+    - On **Windows**:
+      ```bash
+      build.cmd
+      ```
+    - On **Linux/macOS**:
+      ```bash
+      ./build.sh
+      ```
+
+> **Note**: Future releases will be available on PyPI once the project is feature-complete and well-tested.
+
+## License
+
+This project is licensed under the **Apache License 2.0**. See the [LICENSE](LICENSE) file for more details.
+
+## Roadmap
+
+- [ ] Implement core data structures (e.g., fast lists, maps, sets).
+- [ ] Provide SIMD and inline assembly bindings for Python.
+- [ ] Thorough testing and benchmarking.
+- [ ] PyPI release.
+
+## Contributing
+
+Contributions are welcome! Feel free to submit issues or pull requests. Please note that the project is in an early stage, and we appreciate any feedback or suggestions.

README_CN.md

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+<div align="center">
+
+[English](./README.md) | 简体中文
+
+# PyFastUtil
+
+[//]: # (  <p>)
+
+[//]: # (    <!--suppress CheckImageSize -->)
+
+[//]: # (      <img src="./mascot.png" alt="Project Mascot" width="320">)
+
+[//]: # (  </p>)
+
+## 让 Python 更快一点
+
+[![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](LICENSE)
+[![Issues](https://img.shields.io/github/issues/xia-mc/PyFastUtil)](https://img.shields.io/github/issues/Nova-Committee/CheatDetector)
+[![Build](https://github.com/xia-mc/PyFastUtil/actions/workflows/python-package.yml/badge.svg)](https://github.com/xia-mc/PyFastUtil/actions)
+
+</div>
+
+## 简介
+
+**PyFastUtil** 是一个为 Python 提供的高性能工具库，灵感来源于 Java 中的 [FastUtil](https://fastutil.di.unimi.it/) 库。然而，**PyFastUtil 并不是任何现有库的 Python 绑定**，而是一个**从零开始重新实现**的库，旨在为 Python 带来与 Java FastUtil 相同的效率和功能。
+
+> **注意**: PyFastUtil 仍处于**早期开发阶段**。代码库正在积极开发中，尚未准备好用于生产环境。我们正在努力使其功能齐全并经过广泛测试，之后会发布到 PyPI。
+
+### 功能
+
+- 在实现所有对应 Python 数据结构接口的同时，通过针对性优化大幅提升性能，并允许用户根据需求选择最合适的数据结构类型。
+- 完全使用 C/C++ 实现，并通过 SIMD 等硬件针对性优化，旨在最大化提升数据结构的性能。
+- 提供一些高效的 C API Python 绑定，允许高级用户执行一些“不安全”的底层操作。
+
+## 安装
+
+目前，**PyFastUtil** 还未发布到 PyPI。您需要**克隆仓库**并从源代码进行构建。
+
+### 从源代码构建
+
+1. 克隆仓库：
+    ```bash
+    git clone https://github.com/yourusername/PyFastUtil.git
+    cd PyFastUtil
+    ```
+
+2. 构建项目：
+    - 在 **Windows** 上：
+      ```bash
+      build.cmd
+      ```
+    - 在 **Linux/macOS** 上：
+      ```bash
+      ./build.sh
+      ```
+
+> **注意**: 项目功能齐全并经过广泛测试后，将发布到 PyPI。
+
+## 许可证
+
+本项目使用 **Apache License 2.0** 进行开源。有关详细信息，请参阅 [LICENSE](LICENSE) 文件。
+
+## 开发路线图
+
+- [ ] 实现核心数据结构（例如，快速列表、映射、集合）。
+- [ ] 提供 SIMD 和内联汇编的 Python 绑定。
+- [ ] 进行全面的测试和基准测试。
+- [ ] 发布到 PyPI。
+
+## 贡献
+
+欢迎贡献！请随时提交问题或拉取请求。请注意，项目处于早期阶段，我们非常感谢任何反馈或建议。