Add hardware asset info and spreadsheet link

[allthedoll]

Description

This PR adds information around hardware asset management and purchasing to the hambook. 🍔

Related Issue(s)

N/A

Checklist

• I have read the contribution guidelines
• I have considered the performance impact of these changes
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
• For blog PRs, an Art Request has been created (instructions)

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[netlify]

✅ Deploy Preview for flowfuse-website ready!

Name	Link
🔨 Latest commit	1b377f6
🔍 Latest deploy log	https://app.netlify.com/projects/flowfuse-website/deploys/6aac10a4eeb4720008ab0373
😎 Deploy Preview	https://deploy-preview-5820--flowfuse-website.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 46 (🟢 up 11 from production) Accessibility: 95 (no change from production) Best Practices: 92 (no change from production) SEO: 92 (no change from production) PWA: - View the detailed breakdown and full score reports

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[ZJvandeWeg]

I can approve, but not merge. Because GitHub is shitting the bed again.

[UnicornGunnerz]

@allthedoll reminder to change the link when you can.