Files plugin: factor out "Upload" feature as own plugin
The "Upload" feature (see #438 (closed)) should be factored out as own plugin.
A new plugin dmx-file-upload
should be introduced which brings these assets:
- Backend: the "/upload" endpoint
- Frontend: an "Upload File" button for Folder topics
So when the plugin is not installed the Upload feature is completely removed, and the plugin will not be part of (5.2) standard distro.
@jpn pointed out the need to let admins disable file uploads completely (independently of the existing FileService's disk quota feature). A separate dmx-file-upload
plugin is a possible solution.
Thanks to @jpn for the separate plugin idea!