Port GazeInteractionLibrary from 7.x

**Source**: Microsoft.Toolkit.Uwp.Input.GazeInteraction (7.x)
**Destination**: CommunityToolkit.WinUI.* (8.x) — TBD

## Prerequisites

- [ ] Labs-GazeControls relationship needs evaluation

## Porting Basics

- [ ] Namespace updated to `CommunityToolkit.WinUI.*`
- [ ] Code for UWP, WinUI3 and Uno Platform consolidated
- [ ] Desired MultiTargets configured
- [ ] Sample code migrated
- [ ] Concept docs migrated
- [ ] Tests migrated and passing

## Quality Evaluation

See [Porting Criteria](https://github.com/CommunityToolkit/Windows/wiki/Component-Quality-Evaluation) for detailed evaluation guidance.

- [ ] UX: Accessibility reviewed
- [ ] UX: Visual design reviewed
- [ ] UX: Interaction patterns appropriate
- [ ] DX: API surface reviewed
- [ ] DX: API flexibility appropriate
- [ ] DX: Documentation updated
- [ ] MX: Breaking changes documented
- [ ] MX: Domain isolation appropriate
- [ ] MX: Test coverage adequate

## Tracking Gaps

*Sub-issues appear in the task list when linked.*

## Closing

- [ ] All Porting Basics complete
- [ ] Quality Evaluation reviewed
- [ ] Gaps filed as sub-issues

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## 7x Documentation Inventory

**Docs ported to 8x**: n/a

**Docs not in 8x**:
- Summary
- Prerequisites
- Supported Features
- Gaze Concepts
- PointerState Properties
- GazeInput Properties
- GazeElement Events
- StateChangedEventArgs Properties
- DwellProgressEventArgs Properties
- DwellInvokedRoutedEventArgs Properties
- Examples
- To enable gaze interactions on the entire XAML page
- To enable gaze interactions on a portion of the page
- To change the dwell time for a control
- Animations

## 7x Source Inventory

**Source ported to 8x**: n/a

**Source not ported to 8x**:
- [Microsoft.Toolkit.Uwp.Input.GazeInteraction](https://github.com/CommunityToolkit/WindowsCommunityToolkit/tree/c8f76d072df53d3622fb5440d63afb06cb9e7a10/Microsoft.Toolkit.Uwp.Input.GazeInteraction)
- Related: [CommunityToolkit.Labs.Uwp.GazeControls](https://github.com/CommunityToolkit/Labs-GazeControls/tree/main/CommunityToolkit.Labs.Uwp.GazeControls)

## Notes

- Not currently planned for porting. Open to community interest.
- **Related work**: Labs-GazeControls may provide migration path.
- **Archive redirect**: https://learn.microsoft.com/en-us/dotnet/communitytoolkit/windows/archive/gaze

Beginne mit der Überprüfung des Quellbestands von Microsoft.Toolkit.Uwp.Input.GazeInteraction und des zugehörigen Projekts CommunityToolkit.Labs.Uwp.GazeControls. Bewerte anschließend ihre Beziehung und die archivierte Dokumentation zu Gaze. Als abgeschlossen gilt die Aufgabe, wenn die Grundlagen der Portierung und die Checkliste zur Qualitätsbewertung bearbeitet sind und verbleibende Lücken als Unter-Issues erfasst wurden.

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