[1.5.0] Add animation system for maps

[WilliamQiufeng]

Requires Quaver/Quaver.API#164

Allow using lua scripts to run an animation.

It currently has several ways of doing animations:

• Segments and Triggers: A segment contains a function that is called repeatedly between a range of time. Triggers fire only once at a specific time.
  • A Tween Segment is added for smooth change in attributes of anything
  • An IntervalTrigger is used to fire a set number of times with a set interval
  • It supports dynamic adding and destroying, so you can use it with event triggers and other components
• State Machines (Untested but added): A basic state machine that updates only the function of the current state. There can be multiple state machines at the same time.
• Event trigger: You can set a lua callback for events like player hitting a note, or a new note entering the playfield.

It requires a Quaver.API change which I'll open a pr later.

quaver-lua-sprite-loading.mp4

quaver-lua-storyboard.mp4

quaver-spinning-notes.mp4

quaver-spinning-notes-endless.mp4

I'll add more previews some time. These are the ones I recorded several weeks ago.