Feature request: skip part of an animation

### Describe the feature request

I often start an animation from another animation (e.g. copy/pasting the code), and I want to start my new animation from, say, the middle of it (e.g. all objects I need are added and placed where I want), and do something else after. One solution is to use an external program to cut the first X seconds of the video, but not only it is not really practical, but it also takes quite some time and energy to generate this useless first part.

Would it be possible to add something like `self.skip_animations()` and `self.resume_animations()` so that I can skip this part in the final render?