Groups Domain/Application/Infrastructure under Core and WebApi/Worker/StreamingGateway under Hosts. Removes the per-repo .slnx files now superseded by the single solution.
git-subtree-dir: Musify.StreamingGateway git-subtree-mainline: 28426571e6 git-subtree-split: a8ff05892d
28426571e6
a8ff05892d