feat(network): 基于 TSRPC 的网络同步模块 (#318)

- network-protocols: 共享协议包，使用 TSRPC CLI 生成完整类型验证
- network: 浏览器客户端，提供 NetworkPlugin、NetworkService 和同步系统
- network-server: Node.js 服务端，提供 GameServer 和房间管理

packages/network-protocols/src/index.ts

@@ -0,0 +1,34 @@
+/**
+ * @esengine/network-protocols
+ *
+ * 基于 TSRPC 的共享网络协议
+ * TSRPC-based shared network protocols
+ */
+
+// ============================================================================
+// Service Protocol | 服务协议
+// ============================================================================
+
+export { serviceProto } from './shared/protocols/serviceProto';
+export type { ServiceType } from './shared/protocols/serviceProto';
+
+// ============================================================================
+// Types | 类型定义
+// ============================================================================
+
+export type { Vec2, IEntityState, IPlayerInput } from './shared/protocols/types';
+
+// ============================================================================
+// API Protocols | API 协议
+// ============================================================================
+
+export type { ReqJoin, ResJoin } from './shared/protocols/PtlJoin';
+
+// ============================================================================
+// Message Protocols | 消息协议
+// ============================================================================
+
+export type { MsgSync } from './shared/protocols/MsgSync';
+export type { MsgInput } from './shared/protocols/MsgInput';
+export type { MsgSpawn } from './shared/protocols/MsgSpawn';
+export type { MsgDespawn } from './shared/protocols/MsgDespawn';