Add the very nice diagrams from CrowdSupply packaging on the website

[whitequark]

Ideally as both a printable SVG and a smaller / more focused version for on-screen reference.

[victorhooi]

For reference - it should be these diagrams:

@esden Let me know if there's anything I could do to help here (this seemed like low hanging fruit for a non-electronics genius like me) - @whitequark said you had the original files. Otherwise at least the block diagram could be re-created somewhat easily using graphviz, mermaidjs, or any other vector/diagraming software?