Document missing Tabs and Card component props

[mintlify]

Summary

• Added defaultTabIndex prop documentation to the Tabs component, which allows setting the initially active tab by index
• Separated Tabs-level props (defaultTabIndex, sync, borderBottom) from Tab-level props (title, id, icon, iconType) into distinct sections for clarity
• Added disabled prop documentation to the Card component, which disables the card link and CTA hover styling

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Note

Low Risk
Documentation-only changes: adds missing defaultTabIndex prop docs and reorganizes existing prop docs, with no runtime or behavior changes.

Overview
Updates the Tabs documentation to clearly separate wrapper-level props from per-tab props.

Adds docs for the Tabs defaultTabIndex option and moves sync/borderBottom into the new Tabs properties section, leaving title/id/icon/iconType under Tab properties.

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