Simpler code gen for Boolean parameters

[kennykerr]

Building on #3370, this further eliminates the need for the TypeKind trait on Win32 handle types by using a new parameter hint for directly supporting BOOL and BOOLEAN parameters. This greatly simplifies many common Win32 APIs. More work needs to be done to streamline BOOL but this is a big step and this way I can keep this PR focused. Here's a representative "before and after". Note that this does not change sys-style bindings.

Before:

#[inline]
pub unsafe fn EnableMouseInPointer<P0>(fenable: P0) -> Result<()>
where
    P0: Param<BOOL>,
{
    link!("user32.dll" "system" fn EnableMouseInPointer(fenable: BOOL) -> BOOL);
    EnableMouseInPointer(fenable.param().abi()).ok()
}

After:

#[inline]
pub unsafe fn EnableMouseInPointer(fenable: bool) -> Result<()> {
    link!("user32.dll" "system" fn EnableMouseInPointer(fenable: BOOL) -> BOOL);
    EnableMouseInPointer(fenable.into()).ok()
}