[rust] derive Debug for Nc & NcD

rust/src/direct/wrapper.rs

@@ -5,6 +5,7 @@ use std::ops::{Deref, DerefMut};
 use crate::{raw_wrap, NcDirect, NcResult};
 
 /// Safe wrapper around [NcDirect], minimal notcurses instance for styling text.
+#[derive(Debug)]
 pub struct NcD<'a> {
     pub(crate) raw: &'a mut NcDirect,
 }

rust/src/notcurses/wrapper.rs

@@ -7,6 +7,7 @@ use crate::{
 };
 
 /// Safe wrapper around [Notcurses], the main struct of the TUI library.
+#[derive(Debug)]
 pub struct Nc<'a> {
     pub(crate) raw: &'a mut Notcurses,
 }