flutter create --template package_ffi my_package creates a template detailing how to compile C code.

We should consider adding a --language option with c, cpp, objective-c, swift, rust, and go.

• cpp should be almost identical to c, but have a cpp file and use extern "c" and set the language in the hook.
• Objective-C ditto.
• Swift might need some extra steps. @liamappelbe
• Rust can use cbindgen and native_toolchain_rust
• Go can use native_toolchain_go

This would slightly ease exploring native interop with the various languages.

(Side note, we should also figure out how to share templates between flutter create and dart create. As these templates are not flutter specific.)