feat(api): ✨ add unit kind tracking in captor preview

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

src/simulator/api-gdext/src/lib.rs

@@ -3851,6 +3851,7 @@ impl GdGameState {
         moved.current_action = None;
         moved.patrol_order = None;
         moved.formation_id = None;
+        let unit_kind = moved.unit_id.clone();
         let captor_player = &mut self.inner.players[captor_idx];
         captor_player.units.push(moved);
         captor_player.unit_upkeep.push(upkeep.unwrap_or(0));
@@ -3863,6 +3864,7 @@ impl GdGameState {
                 prior_owner: preview.owner,
                 col,
                 row,
+                unit_kind,
             },
         );