[Template] Each experiment NuGet package should have a readme

### Describe the bug

Especially since most take a dependency on WinUI, we need to call out needing the resources like they do. We can also use a readme to point out the experiment link here (and directly to each experiment issue/discussion), etc...

### Steps to reproduce

```text
N/A
```

### Expected behavior

Installing comes with instructions.

### 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, but only if others can assist.

Es werden keine Dateien oder Tests genannt. Beginne damit, die Definitionen der NuGet-Pakete für Experimente zu finden und zu prüfen, wie die Paketdokumentation derzeit eingebunden wird. Fertig ist die Arbeit, wenn jedes Experimentpaket mit Anweisungen, erforderlichen Ressourcen und Links zu seinem Experiment-Issue oder seiner Diskussion installiert wird.

Vom Indexierungsmodell aus dem Issue-Text verfasst.