Draft: Create an interface for packaging and importing analyses

What

This MR introduces the ability to package analyses from one project into a distributable file, and to import those analyses, potentially including their results, into another project.

Why

At the moment it is possible to transfer the required settings for a given analysis easily using analysis blueprint files. Packages will extend this notion, but allow results to be distributed alongside the settings so that a finished analysis can be used in a project. This might be particuarly useful in the case that a user wants to reuse a previous analysis in order to extend it, or use its results as an input in a later analysis in a workflow.