add fmt trait for entry

Author: Disservin

src/common/entry.rs

@@ -1,3 +1,5 @@
+use std::fmt;
+
 use crate::chess::{position::Position, r#move::Move};
 
 use super::{
@@ -30,6 +32,20 @@ impl TrainingDataEntry {
     }
 }
 
+impl fmt::Display for TrainingDataEntry {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "{} {} {} {} {}",
+            self.pos.fen().unwrap(),
+            self.mv.as_uci(),
+            self.score,
+            self.ply,
+            self.result
+        )
+    }
+}
+
 #[derive(Debug, Default, Clone)]
 pub struct PackedTrainingDataEntry {
     pub data: [u8; 32],