Recode the animation system for better dynamic.

[oryxel1]

Currently the animation system is very rough and I don't like it so

• Animation should not only be moving/scaling/rotating, it should also allowing for adding objects, basically extra events, etc....
• A proper timeline editor for animation.
• Separate animation timeline from the main editor timeline.
• Implement all basic blue archive animations.

[oryxel1]

eh, too lazy, will do it later at some point