You mean a global section with all images from the site? You could either set up a custom files section in site.yml which allows querying the whole site, or you create a custom Panel area for the purpose.
The problem with such a global section is that it becomes more difficult for a user to know if a file is used anywhere (unless you provide that information, which is not always easy, because images can be used in many places).
Yes that is what I want. Either of these solutions would work – having a dedicated section in the panel would be even better. Regarding the difficulty for the user to know if a file is used somewhere, that is not a problem.
Do you have any guidelines on how I could achieve such thing?
I managed to create a plugin that retrieves all the files uploaded to the site and allows to remove them from the /content/ folder. This solves the issue partially, as all the files are generated also to the media folder. Is there a way I can solve that? Since each file is wrapped into a folder and generates several versions for the size, is difficult to target each specific file from the media folder.