An Update on WebAssembly/WASI Support in Ruby

CRuby is a highly portable C application, and it runs on many platforms (You can see which platforms are tested on CI here). However the “portability” is only at source level, and the built executable is not portable across architectures and system call interfaces.This project made CRuby portable at executable file level by porting it to a standalone WebAssembly with WASI ABI. Furthermore, we implemented a VFS (Virtual File System) at WASI to package Ruby scripts into a single WebAssembly binary. These improvements make it easier to distribute Ruby scripts.