pub fn hint_slice(buf: &[u8]) {
    let mut my_reader = SyscallWriter { fd: FD_HINT };
    my_reader.write_all(buf).unwrap();
}
Hint bytes to the hint stream.

### Examples
```ignore
let data = vec![1, 2, 3, 4];
sp1_zkvm::io::hint_slice(&data);
```
crates/zkvm/lib/src/io.rs