Three.js Viewport Gizmo Helper

This looks like an excellent contribution to the Three.js ecosystem! The viewport gizmo you've created appears to be a significant enhancement over the official version, offering more customization options and broader compatibility with various camera control systems.

Based on the information provided, this helper would fit well within the "Helpers" category of Three.js addons, similar to other visualization aids like:

• LightProbeHelper
• PositionalAudioHelper
• RectAreaLightHelper
• VertexNormalsHelper

Key Features

From what I can see in the screenshot and description:

• Interactive 3D orientation widget
• Compatible with multiple camera control libraries (OrbitControls, TrackballControls, etc.)
• Highly customizable appearance and behavior
• Can work as a standalone module or integrated with existing controls

Integration Options

The helper appears to work well with several of the standard Three.js controls:

• OrbitControls - for orbit/pan/zoom camera manipulation
• TrackballControls - for trackball-style camera rotation
• Custom controllers like @yomotsu/camera-controls

This kind of helper is particularly useful for 3D modeling applications, CAD viewers, or any 3D scene where users need to maintain spatial awareness while navigating the viewport.

The documentation, quickstart guide, API reference, and examples you've provided should give users everything they need to implement this in their own projects.

If you're looking to share this more widely with the Three.js community, you might consider submitting it to the Three.js examples or highlighting it in the Three.js forum for greater visibility.