提交进入地图和创建房间相关逻辑和协议

Hotfix/Map/System/MapSystem.cs

@@ -0,0 +1,16 @@
+using Fantasy.Entitas.Interface;
+
+namespace NB.Map;
+
+public class MapDestroySystem : DestroySystem<Map>
+{
+    protected override void Destroy(Map self)
+    {
+        self.MapId = 0;
+        self.Units.Clear();
+    }
+}
+
+public static class MapSystem
+{
+}