The models are rotated by 90 degree

**Describe the bug**
All imported models are rotated by 90 degree.

**To Reproduce**
Steps to reproduce the behavior:
1. Start the app
2. Import an asset
3. Enjoy the rotated asset.

**Expected behavior**
The asset shall not be rotated,

**Screenshots**
https://www.reddit.com/r/Assimp/comments/1b1lib3/the_current_status_of_my_own_assetimporterviewer/

**Desktop (please complete the following information):**
- OS: Windows

**Smartphone (please complete the following information):**
NA

**Additional context**
NA

Start by running the app on Windows and following the reported reproduction steps: start the app and import an asset. Trace the import and display path to identify where the 90-degree rotation is introduced; done means imported models retain their expected orientation without affecting other assets.

Written by the indexing model from the issue text.