Animation documentation is not complete

[kurkle]

Tooltip animation configuration is not documented.

The defaults are in Chart.defaults.tooltips.animation.
The default config is:

	animation: {
		duration: 400,
		easing: 'easeOutQuart',
		numbers: {
			type: 'number',
			properties: ['x', 'y', 'width', 'height'],
		},
		opacity: {
			easing: 'linear',
			duration: 200
		}
	},

Originally posted by @benmccann in #7084 (comment)

[benmccann]

Some more ideas of things to add here: #7223

[benmccann]

I think this is fixed now: https://www.chartjs.org/docs/master/configuration/animations/