Ability to have nested folder hierarchy in workspace & granular folder permissions

Currently, we are able to create 1 level of folders on the workspace for organizing coda docs. It would be quite useful to be able to further organize docs with nested folders (ie. enabling nesting 2 or 3 levels deep).

Additionally, the user permissions for a given user are inherited by the workspace settings, and it would be really useful to be able to set permissions on the folder level (eg. only grant some people edit access, while everyone else gets view access)