Add support for drive letters like onedrive integration but to own server

add support like onedrive where all data is fully or partially cached and synced or just editied online so i can add drive letters to my own cloud server using webdav sftp scp sftp etc.
a seemless windows explorer shell integration and/or drive letter.

also add support for aes encryption otr for this and add an android winscp function with aes for this.
also add an option to remotely encrypt (free) all data