docs: add Chinese and Japanese READMEs

README.ja.md

@@ -0,0 +1,39 @@
+[![最新ビルド](https://github.com/fubark/cyber/actions/workflows/latest-build.yml/badge.svg)](https://github.com/fubark/cyber/actions/workflows/latest-build.yml)
+[![Discord サーバー](https://img.shields.io/discord/828041790711136274.svg?color=7289da&label=Discord&logo=discord&style=flat-square)](https://discord.gg/YF82GYvBxQ)
+
+<p align="center"><a href="./README.md">English</a> · <a href="./README.zh-CN.md">简体中文</a> · <a href="./README.ja.md">日本語</a></p>
+
+<img alt="Cyber" src="https://github.com/fubark/cyber/assets/94020660/f7a568bc-5223-41e3-895b-b102d2715187" width="50%">
+
+Cyber は高速で効率的かつ並行処理に対応したスクリプト言語です。デスクトップや Web のアプリケーション、ゲーム、エンジンへ組み込めます。Cyber には CLI も付属しており、コンピューター上でスクリプトを作成・実行できます。
+
+- [ホームページ](https://cyberscript.dev)
+- [プレイグラウンド](https://cyberscript.dev/play.html)
+- [ドキュメント](https://fubark.github.io/cyber)
+- [ダウンロード](https://github.com/fubark/cyber/releases)
+- [パフォーマンス](https://cyberscript.dev/performance.html)
+- [ビルド](https://github.com/fubark/cyber/blob/master/docs/build.md)
+- [コントリビューション](https://github.com/fubark/cyber/blob/master/docs/contributing.md)
+
+### 対応プラットフォーム
+- Linux x64（Ubuntu、Fedora、Arch）
+- macOS x64
+- macOS arm64
+- Windows x64
+- WASM Web
+- WASM WASI
+
+### インストール
+- コマンドプロンプトからインストール（Linux、macOS）
+```sh
+# Install most recent release.
+curl -fsSL https://cyberscript.dev/install.sh | bash
+# Alternative url.
+curl -fsSL https://raw.githubusercontent.com/fubark/cyber/master/install.sh | bash
+
+# Install most recent dev build.
+curl -fsSL https://cyberscript.dev/install.sh | bash -s latest
+```
+- [ダウンロード](https://github.com/fubark/cyber/releases)からインストール。
+- パッケージ
+  - Arch Linux User Repository（AUR）：[cyber](https://aur.archlinux.org/packages/cyber-bin)、[cyber（代替）](https://aur.archlinux.org/packages/cyberscript)

README.md

@@ -1,6 +1,8 @@
 [![Latest Build](https://github.com/fubark/cyber/actions/workflows/latest-build.yml/badge.svg)](https://github.com/fubark/cyber/actions/workflows/latest-build.yml)
 [![Discord Server](https://img.shields.io/discord/828041790711136274.svg?color=7289da&label=Discord&logo=discord&style=flat-square)](https://discord.gg/YF82GYvBxQ)
 
+<p align="center"><a href="./README.md">English</a> · <a href="./README.zh-CN.md">简体中文</a> · <a href="./README.ja.md">日本語</a></p>
+
 <img alt="Cyber" src="https://github.com/fubark/cyber/assets/94020660/f7a568bc-5223-41e3-895b-b102d2715187" width="50%">
 
 Cyber is a fast, efficient, and concurrent scripting language. You can embed it into your applications, games, or engines on desktop or web. Cyber also comes with a CLI so you can do scripting on your computer.

README.zh-CN.md

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+[![最新构建](https://github.com/fubark/cyber/actions/workflows/latest-build.yml/badge.svg)](https://github.com/fubark/cyber/actions/workflows/latest-build.yml)
+[![Discord 服务器](https://img.shields.io/discord/828041790711136274.svg?color=7289da&label=Discord&logo=discord&style=flat-square)](https://discord.gg/YF82GYvBxQ)
+
+<p align="center"><a href="./README.md">English</a> · <a href="./README.zh-CN.md">简体中文</a> · <a href="./README.ja.md">日本語</a></p>
+
+<img alt="Cyber" src="https://github.com/fubark/cyber/assets/94020660/f7a568bc-5223-41e3-895b-b102d2715187" width="50%">
+
+Cyber 是一种快速、高效且支持并发的脚本语言。你可以将它嵌入桌面或 Web 端的应用、游戏或引擎中。Cyber 还提供 CLI，让你能在计算机上编写和运行脚本。
+
+- [主页](https://cyberscript.dev)
+- [在线体验](https://cyberscript.dev/play.html)
+- [文档](https://fubark.github.io/cyber)
+- [下载](https://github.com/fubark/cyber/releases)
+- [性能](https://cyberscript.dev/performance.html)
+- [构建](https://github.com/fubark/cyber/blob/master/docs/build.md)
+- [参与贡献](https://github.com/fubark/cyber/blob/master/docs/contributing.md)
+
+### 支持的平台
+- Linux x64（Ubuntu、Fedora、Arch）
+- macOS x64
+- macOS arm64
+- Windows x64
+- WASM Web
+- WASM WASI
+
+### 安装
+- 使用命令行安装（Linux、macOS）
+```sh
+# Install most recent release.
+curl -fsSL https://cyberscript.dev/install.sh | bash
+# Alternative url.
+curl -fsSL https://raw.githubusercontent.com/fubark/cyber/master/install.sh | bash
+
+# Install most recent dev build.
+curl -fsSL https://cyberscript.dev/install.sh | bash -s latest
+```
+- 从[下载页面](https://github.com/fubark/cyber/releases)安装。
+- 软件包
+  - Arch Linux 用户软件仓库（AUR）：[cyber](https://aur.archlinux.org/packages/cyber-bin)、[cyber（备用）](https://aur.archlinux.org/packages/cyberscript)