added new file for animation and new function for animation

[ArshErgon]

for the issue: #315 I have added a new file for animation type enum
@jmakhack can you tell which type of animation should I add inside the enum?

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[jmakhack]

@ArshErgon please make sure the new dropdown works with the existing animation settings already in the plugin. See #163 if you need a reference.

For the animation options, use the existing one and add any other for now. Please add unit testing as well.