Split models into packages based on repo related functionalities

Split the models from repod.models into repod.repo.management and repod.repo.package to distinguish functionality towards the management repository from that towards the binary repository.

Preparation for #65 (closed), #38 (closed) and #20 (closed)

added cleanup label

requested review from @alex19ep, @torxed, @ainola, @ffy00, and @foxboron

assigned to @dvzrv

requested review from @anthraxx and @artafinde

added 1 commit

• 4463e7fb - Split repository models by functionality

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marked this merge request as ready

merged