Occlusion Culling Setup

Finished Skills Section with the environment setup
Setup Occlusion Culling to improve performance
Removed sky from occlusion culling
Added a loading panel to preload assets
Fixed context text positioning issue.
I realized that there is a minor issue, i can't make the camera and movement work simultaneously, also the movement does the camera rotation as well. this is not minor but major in terms of UX. will fix it in next build