filesystem access

[Geal]

I would like to implement filesystem access in my project, but it requires some thought.
We could reproduce the classic open/read/write API, but how should we expose
"mount points" for applications?
Ideally, I would like to provide FS access to the local disk, but also have a transparent
access to file storage systems like S3.

[losfair]

I think we can take the "everything is a URL" concept from Redox and base all resource locations (e.g. Local paths, remote addresses, S3 storage keys) on URLs with different protocol schemes.

In this way, any resource representable as a URL can be assigned a Resource Identifier unique to the current application at the time of being opened, and things like Metadata or Stream can be further obtained from the resource, regardless of how the resource is implemented.