Update systems design documentation

Update systems design documentation

Description

Adds figures and some information. Fixes broken links due to markdown format.

Developer Checklist

• Code has been tested locally and/or in pipeline.
• (if applicable) documentation updated.
• (if applicable) impact of new dependencies reviewed and included in project.
• Merge conflicts resolved with the target branch.

added modulesystems_design typedocumentation labels

requested review from @timi97tp

assigned to @ellen.seabrooke

approved this merge request

merged

mentioned in commit a7d860ff