Add r2iced

[riptl]

Checklist

• [x] Mark this if you consider it ready to merge
• [ ] I've added tests (optional)
• [x] I wrote some documentation

Description

The r2iced plugin brings support for the iced-x86 disassembler to radare2.

It is not only the fastest x86 diassembler but also proves that Rust interops with radare2! 🦀 ❤️ 📡 👾