Switched the library importing in the launcher to work based on a queue. As a new game is added to the queue, it should find any related data and also add it to the queue. This should result in an easier to maintain importer while reducing the load on the launcher's DAL. This may result in more RAM usage while importing. Local manifests have also been refactored to match manifests in import/export LCX files, removing the old manifest format. This is a large breaking change that will probably break existing game installations. A migration will probably have to be created.
This refactor splits the import and export functionality out of the ImportContext and adds an ExportContext. This also introduced separate importer and exporter implementations.
Additionally, adding archive, save, scripts, and server files to the final export archive has been implemented at the exporter implementation for each instead of handling it in the context. This should be a good pattern if other files need to be added down the road.
