Translate Column sub-component section to es, fr, zh

[mintlify]

Summary

• Translated the new Column sub-component section and updated intro paragraph in components/columns.mdx into Spanish, French, and Chinese
• Added <div id="column-sub-component"> wrappers to preserve anchor links
• No docs.json or API spec changes needed

Triggered by 98956950

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Note

Low Risk
Documentation-only changes (translations and examples) with no runtime or API behavior impact.

Overview
Updates the Spanish, French, and Chinese components/columns.mdx docs to broaden the Columns intro to include arbitrary content and mention the Column sub-component.

Adds a new Column sub-component section (with preserved anchor via <div id="column-sub-component">) including side-by-side text/code examples, plus minor copy/punctuation fixes in the French page.

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