An import source retrieves a module from a source.
Add the ImportFile to retrieve a module from a file.
Add the ImportString to retrieve a module from a string.

Add a new config node that retrieves a module via an import source.
It will parse the module to collect declare and import blocks.
For every imported import block it will create ImportConfigNode children.
The children are evaluated and ran by the parent.
By navigating through the import tree, it's possible to access all imported declares.

When an ImportConfigNode is evaluated, the custom component registry is updated.
Custom components have edges to import node that they depend on.
The componentNodeManager can search in the customComponentRegistry for imported declares.
ImportConfigNodes are runnable nodes. They are ran by the controller.
When a custom component is instantiated with an imported declare, it will have the customComponentRegistry associated with the scope of the import.

… config node

import.file should not have "isSecret" arg because the imported module is not exported.
It should then not use the same args as local.file

…instead of exiting