Extracting Reusable Architectural Components

## User Story
As a canada-ca/architecture contributor
I want a method to extract select architectural elements from this repository
So that I can use individual or groups of architectural elements in my own architectures.

## Implementation details
Currently you can start a project and import a full archimate model and then remove the elements you don't want but this approach is a little cumbersome.

## Related issues:
Archi Tool [[Feature] Allow the copy/past, move, import/export of specific elements between models](https://github.com/archimatetool/archi-modelrepository-plugin/issues/48)

Start by reviewing this issue and the related Archi Tool issue about copying, moving, and importing or exporting specific elements between models. Define which architectural elements can be selected and how extraction should work; done requires an agreed, usable method for reusing individual or grouped elements.

Written by the indexing model from the issue text.