Add docs for High Performance OpenDAL

[Xuanwo]

OpenDAL offers numerous features, but some of them come with additional costs that may not be suitable for all cases. Therefore, OpenDAL allows users to make the decision themselves.

We can collect them and provide a guide for High Performance OpenDAL for users to tune their applications.

Tasks

• [x] concurrent write: https://github.com/apache/opendal/pull/6011
• [ ] concurrent read
• [x] dns caching https://github.com/apache/opendal/pull/6020
• [ ] metrics/trace
• [ ] zero copy buffer
• [ ] fetch

[Xuanwo]

Another good example: https://github.com/GreptimeTeam/greptimedb/pull/4520

[Xuanwo]

I believe we can have a section in opendal::docs for this.