[FEATURE] System infographics

[podhrmic]

Summary

After talking with Raj today, it became clear that an info-graphics explaining the relation between various parts of the OpenSUT (e.g.requirements -> AADL -> CN -> code), and between the current and possible future/swap-able components would be very useful.

I will work with Andrew S to put together some sort of OpenSUT explainer.

Acceptance Criteria

• the explainer is designed
• the explainer is stored in this repo
• the explainer is referenced and used in the OpenSUT docs