docs: Write brand device packs guide

[ggfevans]

Summary

Document brand device packs and device library features.

Migrated from: RackulaLives/www#20

Content Outline

Starter Library

• 43 generic devices included
• Categories and default devices

Available Brand Packs (19 brands)

• Power: APC, CyberPower, Eaton
• Servers: Dell, HPE, Lenovo, Supermicro
• Networking: Ubiquiti, MikroTik, Netgear, TP-Link, Fortinet, Palo Alto, Netgate
• Storage: Synology, QNAP
• Other: DeskPi, BlackMagic

What's in Each Pack

• Device models included
• Front and rear images
• Accurate U dimensions
• Manufacturer specifications

Importing Device Libraries

• JSON format for custom libraries
• Importing from file
• Library merging behaviour

NetBox Integration

• Importing from NetBox device library
• Slug-based device identification
• Compatible field naming (snake_case)
• Component data support (interfaces, power, etc.)

Managing Device Libraries

• Viewing installed devices
• Adding custom device types
• Editing device type definitions
• Deleting unused device types

Contributing Brand Packs

• How to create a brand pack
• Required specifications
• Image guidelines (front/rear)
• Submission process

Acceptance Criteria

• Complete brand pack listing with device counts
• Import instructions for all methods
• NetBox integration documented
• Contribution guidelines complete

Test Requirements

• Build completes without errors
• Brand list is accurate