pub fn new_success() -> WeldError {
        WeldError::new(CString::new("Success").unwrap(), WeldRuntimeErrno::Success)
    }
Creates a new error with a particular message indicating success.

The error returned by this function has a message "Success" and the error code
`WeldRuntimeErrno::Success`.

# Examples

```rust
use weld::{WeldError, WeldRuntimeErrno};

let err = WeldError::new_success();
assert_eq!(err.code(), WeldRuntimeErrno::Success);
assert_eq!(err.message().to_str().unwrap(), "Success");
```
weld/src/lib.rs