[Feature]: Rebase File Manager on rclone

[erezh16]

Feature description

File manager is an alluring feature of waveterm. However, it seems to be based on a custom waveterm implementation of file management. This has several drawbacks:

1. Cost - maintained by waveterm team - issues, bugs, features etc
2. Value - limited to what is available in the code base. So S3 yes, but many cloud backends (GCP, Azure etc) no.
3. Maturity - a derivation of cost. Only so many people and so much time. It freezes sometimes, it breaks etc.

Luckily, there seems to be a solution - rclone. It has unified file/folder API, supports dozens of backends (practically, any storage backend on Earth), is open source (MIT license - least imposing), is OS-portable (at least as much as waveterm) and highly mature and stable - deployed in production environments. Heck, it even has progress feedback on long operations that might be used to make the waveterm file UI more friendly.

Implementation Suggestion

No response

Anything else?

No response