new feature: mount-like service

[xtexx]

Feature Description

I suggest a new service providing mountpoint-based binding to other services.

Each mount is a triple of (path, service operator, prefix), declaring that access to files under path should be forwarded to service operator, with path in their paths replaced with prefix. File access should always match the mount with longest common ancestor.

For example,

• /, A, /
• /dir, B, /test
  Accessing /dir/a should be the same as accessing /test/a with B, accessing /b should be the same as accessing /b with service A.

Problem and Solution

This is because sometimes we may want to storage our data in different services, based on directories.

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.