feat: console port visualization

[ggfevans]

Parent Epic

Part of #71 (Network Interface Visualization and Connectivity)

Summary

Visualize console/serial ports and their connections to console servers.

Console Port Types

• Serial (DE-9, DB-25, RJ-45)
• USB console (USB-A, USB-B, USB-C, Mini, Micro)

Use Cases

• Server → Console server connections
• Switch → Console server connections
• Out-of-band management paths

Acceptance Criteria

• Render console port indicators (distinct icon)
• Support console cable connections
• Visual differentiation from network/power
• Console server device type support

Visual Design

Port Type	Shape	Color
Console (serial)	Triangle/arrow	Gray
Console (USB)	USB icon	Gray

Dependencies

• feat: PortIndicators SVG component #249 (PortIndicators component - extend)
• feat: cable data model and schema #261 (Cable data model - add serial cable type)

References

• Console port types: docs/research/netbox-interface-cable-schema.md