feat: add a new empty struct Die

01.workspace/oxidice_lib/src/lib.rs

@@ -7,5 +7,6 @@ mod str;
 mod trt;
 mod tst;
 
+pub(crate) use crate::str::die::O as Die;
 pub(crate) use crate::str::failed_to::E as FailedTo;
 pub(crate) use crate::str::handful::O as Handful;

01.workspace/oxidice_lib/src/str/die.rs

@@ -0,0 +1,15 @@
+use crate::*;
+
+#[derive(Debug, Default, PartialEq, Clone)]
+pub struct O {}
+
+// impl std::fmt::Display for O {
+// fn fmt(&self, _f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
+// todo!();
+// }
+// }
+
+// #[cfg(test)]
+// mod unit_tests {
+// use super::*;
+// }

01.workspace/oxidice_lib/src/str/mod.rs

@@ -1,2 +1,3 @@
+pub mod die;
 pub mod failed_to;
 pub mod handful;