Draft: Display operations documentation from deployment repository

Integrate the deployment's documentation by pulling in the markdown files as remote source using Astro's content collections.

• Fix the links between the files (currently 404)
• Fix the code blocks (they currently overrun the text boxes)
• Add support for displaying the mermaid diagrams
• Fix some small issues here and there in upstream deployment docs (bmi/opendesk/deployment/opendesk!565 (merged))