new feature: copy files between operators

[sagikazarmark]

Feature Description

Copying files between storage is a common use case. (The CLI tool has an implementation for instance)

Problem and Solution

I created a copy implementation: https://github.com/sagikazarmark/opendal-util/blob/main/src/copy.rs

Would there be any interest in hosting it in this repository? I can open a PR if so.

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.