Added rematch feature

sea_battle_backend/src/data/game_map.rs

@@ -5,7 +5,7 @@ use crate::data::{BoatPosition, CurrentGameMapStatus, EndGameMap, GameRules};
 pub enum FireResult {
     Missed,
     Hit,
-    Sunk,
+    Sunk(BoatPosition),
     Rejected,
     AlreadyTargetedPosition,
 }
@@ -111,7 +111,7 @@ impl GameMap {
                     }
                 }
 
-                FireResult::Sunk
+                FireResult::Sunk(*b)
             }
         }
     }