[BUG] x:TypeArguments with nullable object and StaticResources dont compile

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Did you read the "Reporting a bug" section on Contributing file?

- [x] I have read the "Reporting a bug" section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

### Current Behavior

When defining a XAML object with x:TypeArguments and a nullable object, if there is a StaticResource in that definition, the compilation indicates that the class doesn't exist. If the properties that have StaticResources are removed, then it compiles correctly, forcing those properties to be set in the class's constructor.

For example (This works):
```

...
```
For example (This DON'T work):
```
(with the same class in XAML)

If put some StaticResource in any property the compilation fail.

### Link to public reproduction project repository

https://github.com/goyometeojorito/MauiGenericPopupError/blob/master/GenericPopup.xaml

### Environment

```markdown
- .NET MAUI CommunityToolkit: 12.0.0
- OS: Android 14
- .NET MAUI: 9.0.80
```

### Anything else?

_No response_