官方文档建议增加bazel的编译介绍，目前只有cmake和config_brpc.sh的步骤

[noobJiang]

Is your feature request related to a problem?

官方文档目前只有cmake和config_brpc.sh的步骤 Describe the solution you'd like 建议增加bazel的编译介绍，或者描述通用的编译步骤方便开发者理解。

Describe alternatives you've considered 开发者真正的理解之后可以自行编写适合自己的编译流程。

Additional context/screenshots