Cleanup mod com, registry, setup_config and winapi

[NobodyXu]

Uses items exported from the official crate windows_sys instead of homebrew definition whenever possible.

[thomcc]

Are any of the types from windows-rs this adds to public APIs more complex than simple typedefs of primitives?

E.g. would we have to cut a breaking change if we bump the windows-sys version? (That seems unacceptable given how frequently they cut breaking changes)

[NobodyXu]

Are any of the types from windows-rs this adds to public APIs more complex than simple typedefs of primitives?

Well there is indeed a few types imported that are not typedefs:

pub use windows_sys::{
    core::GUID,
    Win32::{
        Foundation::FILETIME,
        System::Com::{SAFEARRAY, SAFEARRAYBOUND},
    },
};

E.g. would we have to cut a breaking change if we bump the windows-sys version? (That seems unacceptable given how frequently they cut breaking changes)

No, windows-sys is not used in public interfaces, all changes are to modules that are used internally only.

[thomcc]

Seems fine then.