add full animation support for all slide objects

[BapunHansdah]

feat: implement full animation support for PPT objects

This adds a complete animation engine including:

• Entrance, Emphasis, Exit, and Motion Path animations
• New animation API for text/shapes/images/charts

This completes the full animation implementation in PptxGenJS (currently supported only in PowerPoint).

Demo link : Demo

Sample Example : -

slide.addText("Fly in from left", {
x: 1, y: 2, w: 6, h: 1,
animation: {
type: 'flyin',
direction: 'left',
duration: 1000,
delay: 500
}
});

[HuWeiMin888]

I'm glad to see that you've already implemented the animation feature—it could take ages for the official version to include it.
Would you mind publishing an npm release so I can start using it right away?