refactor(components): [carousel] class optimization in code

[wzc520pyfm]

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Description

🤖[deprecated] Generated by Copilot at 88bf522

Refactored the class binding logic of the carousel-item component to use a computed property. This made the code more readable and maintainable.

Related Issue

Fixes #___.

Explanation of Changes

🤖[deprecated] Generated by Copilot at 88bf522

• Simplify :class binding of carousel-item component by using computed property itemKls (link)
• Define itemKls computed property in setup function of carousel-item component (link)
• Use ns utility to generate class names with el- prefix and is and em modifiers (link)
• Use value property of ref objects to access reactive values of active, inStage, hover, and animating (link)
• Depend on isCardType and isVertical props for itemKls computed property (link)

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