Add orbit camera script example

[aglitchman]

I decided to add orbit camera in all 3d examples, and to do this I added a camera example. I think it will be useful for the next 3d examples, i.e. it is enough to add the script to the collection.

Plus, the camera has a nice intertia!

https://github.com/user-attachments/assets/80a1fdd1-d07b-4ceb-b778-18c91f5fe60c

[britzl]

Thanks!