Looks interesting, but Windows and Android only. I am a Mac user.....I have a few Android devices but I never envisaged organising comic collections on them.
As for Calibre plugins, there seems to be this:
https://github.com/dickloraine/EmbedComicMetadata
Still not sure how you get hold of the metadata. Maybe you have to manually enter it, in which case that's a no from me: life's too short!