docs(components): [collapse] use new display tag

[wzc520pyfm]

Related: #10754

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Description

🤖[deprecated] Generated by Copilot at 2b6b746

This pull request adds and improves JSDoc comments for the Collapse component and its subcomponents in the source code and documentation files. This enhances the readability, maintainability, and usability of the component.

Related Issue

Fixes #___.

Explanation of Changes

🤖[deprecated] Generated by Copilot at 2b6b746

• Add JSDoc comments for collapseProps and collapseItemProps in the source code to generate documentation and provide type hints (link, link)
• Update collapse.md to clarify the type and default value of model-value / v-model and the type of change event parameter in Collapse Attributes section (link)
• Update collapse.md to add default values of title and disabled and use consistent spacing for type union of name in Collapse Item Attributes section (link)

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🧪 Playground Preview: https://element-plus.run/?pr=14955
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