Updated graphics engine

The graphics engine in LIRA-CAD 2025 has been updated to support OpenGL 4.6 graphics. It allows for greater compatibility with graphic equipment from various manufacturers and enhances visualization of designed objects.

1. The speed for model rendering is increased. Now when you change the view, rotate or perform other actions with the model, the screen refreshes 7-10 times faster compared to previous versions.
2. The quality of textures, labels, texts and lines is improved.
3. Visual effects of falling shadows, relief surfaces, fog and diffuse shading are implemented.