[docs: autonomous-visual-synthesis] Added Mermaid diagrams to represent workflow steps and folder structures

[beginwebdev2002]

Analyzed markdown files for visual candidates and autonomously injected structurally correct Mermaid diagrams using specified design tokens, adhering to the Zero-Approve mandate.

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PR created automatically by Jules for task 827292220802382701 started by @beginwebdev2002

[google-labs-jules]

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