new feature: Async support for C binding

[tbEgg]

Feature Description

OceanBase currently utilizes libaio to implement async r/w operations for the file system. We hope that OpenDAL C bindings can provide a similar mechanism to enable async r/w operations for object storage.

Problem and Solution

similar feature: Tracking Issue: Async support for C++ binding

Additional Context

No response

Are you willing to contribute to the development of this feature?

• Yes, I am willing to contribute to the development of this feature.

[xyjixyjixyji]

I have looked into this before and try to implement it. I would say hyper's capi implementation is a very good example of implementing an i/o based async. Basically this will need to carefully smth similar to an executor.