feat: 添加游戏核心模块，包括地图、角色、场景和世界管理

实现游戏基础架构，包含以下主要功能：
- 地图系统：支持地图加载、图层管理和相机控制
- 角色系统：实现角色装备、动画和行为管理
- 场景系统：提供测试场景和世界场景切换
- 世界管理：处理城镇和区域切换逻辑
- 数据加载：添加角色和装备配置加载器

这些改动为游戏开发奠定了基础框架，支持后续功能扩展

Game/src/world/GameWorld.cpp

@@ -0,0 +1,84 @@
+#include "world/GameWorld.h"
+#include "map/GameDataLoader.h"
+#include <SDL2/SDL.h>
+#include <frostbite2D/scene/scene_manager.h>
+
+namespace frostbite2D {
+
+GameWorld::GameWorld() = default;
+
+void GameWorld::onEnter() {
+  Scene::onEnter();
+  if (initialized_) {
+    return;
+  }
+
+  initialized_ = InitWorld();
+}
+
+void GameWorld::onExit() {
+  Scene::onExit();
+}
+
+bool GameWorld::InitWorld() {
+  townPathMap_ = game::loadTownList();
+  if (townPathMap_.empty()) {
+    SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "GameWorld: no town entries found");
+    return false;
+  }
+
+  for (const auto& [townId, townPath] : townPathMap_) {
+    auto town = MakePtr<GameTown>();
+    if (!town->Init(townId, townPath)) {
+      continue;
+    }
+    townMap_[townId] = town;
+  }
+
+  if (townMap_.empty()) {
+    SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "GameWorld: failed to create any town");
+    return false;
+  }
+
+  AddCharacter(nullptr, townMap_.begin()->first);
+  return true;
+}
+
+void GameWorld::AddCharacter(RefPtr<Actor> actor, int townId) {
+  auto it = townMap_.find(townId);
+  if (it == townMap_.end()) {
+    SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "GameWorld: town %d not found", townId);
+    return;
+  }
+
+  mainActor_ = actor;
+  curTown_ = townId;
+  it->second->AddCharacter(actor);
+  AddChild(it->second);
+}
+
+void GameWorld::MoveCharacter(RefPtr<Actor> actor, int townId, int area) {
+  auto townIt = townMap_.find(townId);
+  if (townIt == townMap_.end()) {
+    SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "GameWorld: target town %d missing", townId);
+    return;
+  }
+
+  if (curTown_ != -1) {
+    auto currentTown = townMap_.find(curTown_);
+    if (currentTown != townMap_.end()) {
+      RemoveChild(currentTown->second);
+    }
+  }
+
+  curTown_ = townId;
+  mainActor_ = actor;
+  townIt->second->AddCharacter(actor, area);
+  AddChild(townIt->second);
+}
+
+GameWorld* GameWorld::GetWorld() {
+  return dynamic_cast<GameWorld*>(SceneManager::get().GetCurrentScene());
+}
+
+} // namespace frostbite2D