docs: #6 Firmware / device CDN consume contract

[patoperpetua]

Summary

• Add docs/firmware-consume.md (mono SVG/PNG, favicons, runtime embed policy, pin options)
• Link it from the root README and point at poc-inkads-firmware-display-device

Closes #6

Companion: firmware README link PR (same issue) once this path exists on main.

Test plan

• Open listed CDN URLs (mono SVG/PNG, favicons) — expect 200
• Confirm /releases/0.2.0/… still 404 and docs describe npm pin instead
• Skim firmware README companion for the blob link

Made with Cursor

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📥 Commits

Reviewing files that changed from the base of the PR and between f45cea9 and a675235.

📒 Files selected for processing (2)

• README.md
• docs/firmware-consume.md

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