Allow mapping layers to a subdirectory

[srid]

Eg: --layers "foo=~/Notes/foo;." should put foo notes under /foo/ in Emanote.

Is there a way to specify the directory of the layer (e.g. in subdirectorylecture-notes)? I don't want Lecture Notes to be included in my root emanotes view since there are lots of loose files and it clutters up the directory view.

Originally posted by @B4rc1 in https://github.com/srid/emanote/discussions/253#discussioncomment-2160252

[srid]

This probably should be done in https://github.com/srid/unionmount