Add excalidraw

[jmintuitive]

Description

Follow up to add the excalidraw image. (Also pnpm fmt changed 2 things)

Checklist

• Do all Lints pass?
  • [ ] Have you ran pnpm spellcheck?
  • [x] Have you ran pnpm fmt?
  • [x] Have you ran pnpm lint?

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Name	Status	Preview	Comments	Updated (UTC)
developer-docs-nextra	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 12, 2024 2:17am

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[jmintuitive]

Follow up to https://github.com/aptos-labs/developer-docs/pull/398

@hariria please review when you have a chance :)