Create README_en.md for SakuOS project

Added README_en.md with project details and instructions.

README_en.md

@@ -0,0 +1,91 @@
+# SakuOS
+Delete? No — Reborn.  
+A lightweight operating system that gives your old PC one last chance before it goes to the trash.
+
+SakuOS is a minimal and experimental OS project built around the concept of  
+**“an operating system that starts from what you don’t need.”**  
+Currently **CLI-only**, with a GUI under development.
+
+We’re looking for contributors who want to build this OS together.
+
+---
+
+## 🌱 Concept
+- A lightweight OS designed to revive old or unused PCs  
+- The desktop’s main character is the **Trash Bin**  
+- The system aims to learn from deleted files and uninstalled apps  
+  to highlight “what you truly need”  
+- Still highly experimental — specifications may change significantly
+
+---
+
+## 🧪 Current Status (Beta 0.1 Preview)
+- Boots into CLI  
+- Bootloader → Kernel startup works  
+- GUI not implemented yet  
+- Installation not supported (live boot only)
+
+---
+
+## 📦 Build Instructions
+
+### Requirements
+- `gcc` / `ld`
+- `nasm`
+- `grub-mkrescue`
+- `xorriso`
+- `qemu-system-x86_64`
+
+### Build
+```bash
+./compile.sh
+```
+
+### Run with QEMU
+```bash
+qemu-system-x86_64 -cdrom SakuOS.iso
+```
+
+---
+
+## 📁 Directory Structure
+```text
+SakuOS/
+├── src/
+│   ├── kernel.c
+│   ├── start.asm
+│   ├── multiboot.asm
+│   ├── compile.sh
+│   └── linker.ld
+├── LICENSE
+└── README.md
+```
+
+---
+
+## 💾 Download
+ISO images are available on GitHub Releases.
+
+---
+
+## 🛠 Development Status
+- Implementing memory management  
+- Preparing interrupt handling (IDT / PIC)  
+- Designing the foundation of the GUI (drawing, window management)  
+- Prototyping the “Trash Bin–centric UI” concept  
+
+---
+
+## 🤝 Contributing
+Bug reports, feature suggestions, documentation fixes — everything is welcome.  
+Feel free to open Issues or Pull Requests.
+
+---
+
+## 📜 License
+This project is released under the **Saku-kun Software License 1.1**.
+
+---
+
+## 🌐 Official Website
+https://sakuzyo.net/os/SakuOS/