* introduces a new IRootMountProvider to register mount points inside the root storage
* adds a AppdataPreviewObjectStoreStorage to handle the split between preview folders and bucket number
Ref #22033
Signed-off-by: Morris Jobke <hey@morrisjobke.de>
Else the number of files can grow very large very quickly in the preview
folder. Esp on large systems.
This generates the md5 of the fileid. And then creates folders of the
first 7 charts. In that folder is then a folder with the fileid. And
inside there are the previews.
Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>