feat(css): Update syntax for `animation-duration`

[skyclouds2001]

Description

the update add support for the auto keyword, which is supported since chrome v115 and Safari v18.4

it also update the <time> type for specifying ranged value

Motivation

Additional details

https://developer.mozilla.org/en-US/docs/Web/CSS/animation-duration https://drafts.csswg.org/css-animations-2/#propdef-animation-duration

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