Create the content of "3. Context and Scope" (arc42-Documentation)

This is a general ticket for tasks related to creating, reviewing, and coordinating the content of chapter "3. Context and Scope" in the arc42 documentation.

https://nextcloud.fitko.de/f/2070479

Next steps:

Sprint 1

• Definitions for structure of the document
• and artefacts (models/diagrams) as basis for the ongoing documentation and creation of architecture model and views

Sprint 2

• Finalize structure of the document.
• draft of system landscape diagram (structrurizer model + view) -> #189
• Making the draft publishable (openCode) for contributions.

AC

• Business Context described (including flow diagram (highest level) #165 (closed)).
• Technical Context described and reviewed
• inclusive view (diagram) -> Structurizr model
• descriptions of components (including interfaces from #66).