Feature Request: Rename posters and background based upon image dimensions

[Drazzilb08]

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Consistantly having to name files poster.ext and background.ext

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The idea is to download posters and backgrounds and place them into their proper folder (folders generated by the assets_for_all: true tag) and have the script automatically name the assets. This would eliminate the need to repetitively name them poster and background. Possibly have a tag in the settings (per library) to allow for this renaming feature

Describe alternatives you've considered
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Manually adding each poster and background to each directory

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[Drazzilb08]

Works super well. I can consider this one closed.