feat: more derive traits for Fixed type

src/types.rs

@@ -72,7 +72,7 @@ pub struct Fd(pub RawFd);
 /// A file descriptor that has been registered with io_uring using
 /// [`Submitter::register_files`](crate::Submitter::register_files) or [`Submitter::register_files_sparse`](crate::Submitter::register_files_sparse).
 /// This can reduce overhead compared to using [`Fd`] in some cases.
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
 #[repr(transparent)]
 pub struct Fixed(pub u32);