feat(server): add Schema validation system and binary encoding optimization (#421)

* feat(server): add distributed room support

- Add DistributedRoomManager for multi-server room management
- Add MemoryAdapter for testing and standalone mode
- Add RedisAdapter for production multi-server deployments
- Add LoadBalancedRouter with 5 load balancing strategies
- Add distributed config option to createServer
- Add $redirect message for cross-server player redirection
- Add failover mechanism for automatic room recovery
- Add room:migrated and server:draining event types
- Update documentation (zh/en)

* feat(server): add Schema validation system and binary encoding optimization

## Schema Validation System
- Add lightweight schema validation system (s.object, s.string, s.number, etc.)
- Support auto type inference with Infer<> generic
- Integrate schema validation into API/message handlers
- Add defineApiWithSchema and defineMsgWithSchema helpers

## Binary Encoding Optimization
- Add native WebSocket binary frame support via sendBinary()
- Add PacketType.Binary for efficient binary data transmission
- Optimize ECSRoom.broadcastBinary() to use native binary

## Architecture Improvements
- Extract BaseValidator to separate file to eliminate code duplication
- Add ECSRoom export to main index.ts for better discoverability
- Add Core.worldManager initialization check in ECSRoom constructor
- Remove deprecated validate field from ApiDefinition (use schema instead)

## Documentation
- Add Schema validation documentation in Chinese and English

* fix(rpc): resolve ESLint warnings with proper types

- Replace `any` with proper WebSocket type in connection.ts
- Add IncomingMessage type for request handling in index.ts
- Use Record<string, Handler> pattern instead of `any` casting
- Replace `any` with `unknown` in ProtocolDef and type inference

.changeset/distributed-room-support.md

@@ -0,0 +1,21 @@
+---
+"@esengine/server": minor
+---
+
+feat(server): 添加分布式房间支持 | Add distributed room support
+
+**@esengine/server** - 新增分布式房间管理功能 | Added distributed room management features
+
+- 新增 `DistributedRoomManager` 支持多服务器房间管理 | Added `DistributedRoomManager` for multi-server room management
+- 新增 `MemoryAdapter` 用于测试和单机模式 | Added `MemoryAdapter` for testing and standalone mode
+- 新增 `RedisAdapter` 用于生产环境多服务器部署 | Added `RedisAdapter` for production multi-server deployments
+- 新增 `LoadBalancedRouter` 支持 5 种负载均衡策略 | Added `LoadBalancedRouter` with 5 load balancing strategies
+  - round-robin: 轮询 | Round robin
+  - least-rooms: 最少房间数 | Fewest rooms
+  - least-players: 最少玩家数 | Fewest players
+  - random: 随机选择 | Random selection
+  - weighted: 权重（基于容量使用率）| Weighted by capacity usage
+- `createServer` 新增 `distributed` 配置选项 | Added `distributed` config option to `createServer`
+- 新增 `$redirect` 消息用于跨服务器玩家重定向 | Added `$redirect` message for cross-server player redirection
+- 新增故障转移机制，服务器离线时自动恢复房间 | Added failover mechanism for automatic room recovery on server offline
+- 新增 `room:migrated` 和 `server:draining` 事件类型 | Added `room:migrated` and `server:draining` event types