Create component level (C4) diagram for migration architecture

[jonasdmoeller]

Convert the diagram of our migration architecture to a component diagram in accordance with the third level of the C4 model.

Acceptance criteria

• [ ] AC1: Diagram is a C4 variant of the migration arcitecture diagram already defined in Miro
• [ ] AC2: Diagram must be created using Structurizr plugin in VS Code
• [ ] AC3: The "diagram as code" is submitted to the opengeh-arch-diagram repository upon completion

Link here: https://energinet.atlassian.net/wiki/spaces/D3/pages/290390081/Migration