Would it be possible to make the object storage backend a pluggable mechanism?

[wjunLu]

Based on the current JuiceFS code, integrating a new object storage backend requires direct modifications and additions to the repository's code to handle the new object storage.

This may result in a lengthy code integration cycle and the potential to impact existing functionality. Would it be possible to optimize the code architecture and adopt a JuiceFS + External Object Storage Plugin approach?