Add imported products

For compatibility with v2:

• Add imported subscriptions as separate products
• Register all workflows in the database
• Add import workflows for creating these new products
• Rework the file structure of the API
• Add documentation for missing modules
• Add modification workflows that take ImportedX to X

The "import LAB data" wiki page still applies, the command has not changed in behaviour.

docs/source/module/api/v1/index.rst

@@ -12,7 +12,6 @@ Submodules
    :maxdepth: 2
    :titlesonly:
 
-   imports
    subscriptions
    processes
-   networks
+   network