improve README and documentation (#8)

README.md

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+English | [中文](README.zh_CN.md)
+
+# tRPC-Go Database Plugin
+
+In the daily development process, developers often need to access various storage systems such as MySQL, Redis, Kafka, etc., for database operations. While using open-source SDKs can fulfill the requirements for accessing databases, developers are responsible for handling naming routing, monitoring, and configuration themselves.
+
+Considering that tRPC-Go provides a variety of plugins for naming routing, monitoring, and configuration management, it is possible to wrap open-source SDKs to reuse tRPC-Go's capabilities and reduce redundant code. tRPC-Go offers encapsulation for some open-source SDKs, allowing you to directly leverage tRPC-Go's features for naming routing, monitoring, and more.
+
+| Database | Description |
+| :-------: | :---------- |
+| bigcache | Wraps the open-source local caching database [Bigcache](https://github.com/allegro/bigcache) |
+| clickhouse | Wraps the open-source database [Clickhouse SDK](https://github.com/ClickHouse/clickhouse-go) |
+| cos | Wraps Tencent Cloud Object Storage [COS SDK](https://github.com/tencentyun/cos-go-sdk-v5) |
+| goredis | Wraps the in-memory database [Redis SDK](https://github.com/redis/go-redis) |
+| gorm | Wraps the Golang ORM library [GORM](https://github.com/go-gorm/gorm) |
+| hbase | Wraps the open-source database [HBase SDK](https://github.com/tsuna/gohbase) |
+| kafka | Wraps the open-source Kafka message queue SDK [Sarama](https://github.com/IBM/sarama) |
+| mysql | Wraps the open-source database [MySQL Driver](https://github.com/go-sql-driver/mysql) |
+| timer | Local/distributed timer functionality |

README.zh_CN.md

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+[English](README.md) | 中文
+
+# tRPC-Go Database 插件
+
+在日常的开发过程中，开发者经常会访问 MySQL、Redis、Kafka 等存储进行数据库的读写。直接使用开源的 SDK 虽然可以满足访问数据库的需求，但是用户需要自己负责路由寻址、监控上报、配置的开发。
+
+考虑到 tRPC-Go 提供了多种多样的路由寻址、监控上报、配置管理的插件，我们可以封装一下开源的 SDK，复用 tRPC-Go 插件的能力，减少重复代码。tRPC-Go 提供了部分开源 SDK 的封装，可以直接复用 tRPC-Go 的路由寻址、监控上报等功能。
+
+| 数据库 | 描述 |
+| :----: | :----   |
+| bigcache | 封装开源本地缓存数据库 [Bigcache](https://github.com/allegro/bigcache) |
+| clickhouse | 封装开源数据库 [Clickhouse SDK](https://github.com/ClickHouse/clickhouse-go) |
+| cos | 封装腾讯云对象存储 [COS SDK](https://github.com/tencentyun/cos-go-sdk-v5) |
+| goredis | 封装内存数据库 [Redis SDK](https://github.com/redis/go-redis) |
+| gorm | 封装 Golang ORM 库 [GORM](https://github.com/go-gorm/gorm) |
+| hbase | 封装开源数据库 [HBase SDK](https://github.com/tsuna/gohbase) |
+| kafka | 封装开源消息队列 Kafka SDK [Sarama](https://github.com/IBM/sarama) |
+| mysql | 封装开源数据库 [Mysql Driver](https://github.com/go-sql-driver/mysql) |
+| timer | 本地/分布式定时器 |

bigcache/README_ZH.md → bigcache/README.zh_CN.md

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+[English](README.md) | 中文
+
 # tRPC-Go bigcache 插件
 
 封装社区的 [bigcache](https://github.com/allegro/bigcache) ，配合 trpc 使用。