AppPages.dart use wrong path

The AppPages class use path define in _Paths class for GetPages.
So if you want composite path, you cannot do it.
Example :
- I have signin page '/signin'
- I have signin advance page '/signin/advance'
- My current page is '/signin'
- If I navigate to '/signin/adance', the app navigate to '/signin' again.

The fix is just use path define in Routes class and not _Paths.

Hope to help !!