back to lobby state when server ends

src/td/game/World.cpp

@@ -110,6 +110,11 @@ void World::Tick(std::uint64_t delta) {
 	CleanDeadMobs();
 }
 
+void World::Reset() {
+	m_Towers.clear();
+	m_Mobs.clear();
+}
+
 void World::SpawnMobAt(MobID id, MobType type, std::uint8_t level, PlayerID sender, float x, float y, Direction dir) {
 	MobPtr mob = MobFactory::CreateMob(id, type, level, sender);
 	mob->SetCenter({ x, y });