Request: sort all items emitted based on their item type

[Lokathor]

When generating bindings for say SDL2 you get output portions like this:

pub const SDL_INIT_EVERYTHING: u32 = 62001;
extern "C" {
  pub fn SDL_GetPlatform() -> *const chlorine::c_char;
}
pub type size_t = chlorine::c_ulonglong;
pub type wchar_t = chlorine::c_ushort;
pub type va_list = __builtin_va_list;
pub const SDL_FALSE: SDL_bool = 0;
pub const SDL_TRUE: SDL_bool = 1;
pub type SDL_bool = i32;

It would be nice if all items could be sorted so that (for example) all types are declared first, then all structs, then all consts, then all function signatures, etc.

[emilio]

I think that'd be reasonable... I think our current ordering is the order in which we parse the C / C++