Unable to add documentation without a sample control

### Describe the bug

Some toolkit components do not have sample controls, but do have documentation that needs to be available to end users. For example, https://github.com/CommunityToolkit/Labs-Windows/pull/438.

### Steps to reproduce

```text
n/a
```

### Expected behavior

Devs should be able to write markdown docs without an interactive sample.

### Screenshots

_No response_

### Code Platform

- [ ] UWP
- [ ] WinAppSDK / WinUI 3
- [ ] Web Assembly (WASM)
- [ ] Android
- [ ] iOS
- [ ] MacOS
- [ ] Linux / GTK

### Windows Build Number

- [ ] Windows 10 1809 (Build 17763)
- [ ] Windows 10 1903 (Build 18362)
- [ ] Windows 10 1909 (Build 18363)
- [ ] Windows 10 2004 (Build 19041)
- [ ] Windows 10 20H2 (Build 19042)
- [ ] Windows 10 21H1 (Build 19043)
- [ ] Windows 11 21H2 (Build 22000)
- [ ] Other (specify)

### Other Windows Build number

_No response_

### App minimum and target SDK version

- [ ] Windows 10, version 1809 (Build 17763)
- [ ] Windows 10, version 1903 (Build 18362)
- [ ] Windows 10, version 1909 (Build 18363)
- [ ] Windows 10, version 2004 (Build 19041)
- [ ] Other (specify)

### Other SDK version

_No response_

### Visual Studio Version

_No response_

### Visual Studio Build Number

_No response_

### Device form factor

_No response_

### Additional context

_No response_

### Help us help you

Yes, I'd like to be assigned to work on this item.

In der Issue ist keine Datei und kein Test angegeben. Beginne damit, den verknüpften PR 438 und den Dokumentations-Workflow des Repositorys zu prüfen; abgeschlossen ist die Arbeit, wenn Markdown-Dokumentation für Komponenten ohne Beispiel-Steuerelemente hinzugefügt werden kann.

Vom Indexierungsmodell aus dem Issue-Text verfasst.