ISettingsStorageHelper namespace incorrect

### Describe the bug

Not sure how this was missed, but the ISettingsStorageHelper has a different namespace than all the other helpers here:

https://github.com/CommunityToolkit/dotnet/blob/9d1a525d04299e5421cb3e5917825fee2bc11a18/CommunityToolkit.Common/Helpers/ObjectStorage/ISettingsStorageHelper.cs#L5

All the other helpers are `CommunityToolkit.Common.Helpers`...

https://github.com/CommunityToolkit/dotnet/blob/9d1a525d04299e5421cb3e5917825fee2bc11a18/CommunityToolkit.Common/Helpers/ObjectStorage/IFileStorageHelper.cs#L8

Similarly the extension helper to it has a `.Extensions`:

https://github.com/CommunityToolkit/dotnet/blob/9d1a525d04299e5421cb3e5917825fee2bc11a18/CommunityToolkit.Common/Extensions/ISettingsStorageHelperExtensions.cs#L8

Where the other extensions do not and are just part of `CT.Common`.

### Regression

_No response_

### Steps to reproduce

```text
N/A Code Quality
```

### Expected behavior

Consistency in Namespace

### Screenshots

_No response_

### IDE and version

VS 2022

### IDE version

_No response_

### Nuget packages

- [X] CommunityToolkit.Common
- [ ] CommunityToolkit.Diagnostics
- [ ] CommunityToolkit.HighPerformance
- [ ] CommunityToolkit.Mvvm (aka MVVM Toolkit)

### Nuget package version(s)

8.0.0

### Additional context

Not sure if there's other places to audit?

### Help us help you

Yes, but only if others can assist