animations

Hi,

I'm having the following crash, sometimes in a transition:

Crashed: com.apple.main-thread
0 Hero 0x102bc6940 HeroContext.snapshotView(for : UIView) -> UIView (HeroContext.swift:182)
1 Hero 0x102bfdbbc HeroDefaultAnimator.animate(view : UIView, appearing : Bool) -> () (HeroDefaultAnimator.swift:107)
2 Hero

The current example app is a really simple approach on what can be done with ViewAnimator. Even though the library is not complex to integrate and use on your own projects it would be nice to show how to use different animations in different scenarios.

I'd be replicating the app should on the animations Complex header.

<image src="https://cdn.dribbble.com/users/702789/screenshots/381608

This change should be tested.

Originally posted by @behackl in ManimCommunity/manim#1722 (comment)

All colors used in tsParticles are simple, I think supporting gradients could be a good addition since particles can obtain another effect just with colors.

How I think gradient should be configured:

{
   "particles":{
      "color":{
         "value":{
            "gradient":{
               "type":"linear",
               "angle": {
                 "value": 0,
          

In order to have a well documented API we need to describe what each class, struct, enum and method responsibilities are and how to use it.

Currently, the framework is lagging unit testing. Add some unit test.