Add disabled prop to Card component docs

[mintlify]

Summary

• Documents the disabled prop on the Card component, which makes the card non-interactive and disables its href link
• This prop exists in the source code but was missing from the documentation

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Note

Low Risk
Low risk documentation-only change that adds a missing disabled prop description; no runtime behavior is modified.

Overview
Documents the Card component’s new/previously-undocumented disabled boolean prop, clarifying that setting it makes the card non-interactive and disables its href link.

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