[Feature] Support integration with JuiceFS

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/incubator-paimon/issues) and found nothing similar.

### Motivation

JuiceFS is a high-performance [POSIX](https://en.wikipedia.org/wiki/POSIX) file system released under Apache License 2.0, particularly designed for the cloud-native environment. The data, stored via JuiceFS, will be persisted in object storage (e.g. Amazon S3), and the corresponding metadata can be persisted in various database engines such as Redis, MySQL, and TiKV based on the scenarios and requirements. Paimon could support integration with JuiceFS.

### Solution

Paimon supports integration with JuiceFS.

### Anything else?

_No response_

### Are you willing to submit a PR?

- [X] I'm willing to submit a PR!

No files, tests, or entry points are named. Start by defining the integration boundary and required JuiceFS behavior from the issue; done would require an agreed implementation and validation plan, since the issue currently only states the goal.

Written by the indexing model from the issue text.