Start to build cli player

rust/sea_battle_backend/src/test/play_utils.rs

@@ -0,0 +1,12 @@
+use crate::human_player_ws::ServerMessage;
+
+/// Make sure player can not replay after successful hit
+pub fn check_no_replay_on_hit(msg: &ServerMessage) {
+    if let ServerMessage::OpponentMustFire { status } | ServerMessage::RequestFire { status } = msg
+    {
+        let diff =
+            status.opponent_map.number_of_fires() as i32 - status.your_map.number_of_fires() as i32;
+
+        assert!(diff <= 1);
+    }
+}