feat: add ui helper for div

[aeneasr]

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Further comments

[Copilot]

Pull Request Overview

This PR adds a new UI helper that provides a TypeScript type guard for <div> nodes.

• Added import for UiNodeDivisionAttributes.
• Introduced isUiNodeDivAttributes to check for node_type "div".

Comments suppressed due to low confidence (1)

contrib/fetch/src/ui.ts:82

• The function name 'isUiNodeDivAttributes' is inconsistent with the full type name 'UiNodeDivisionAttributes'. Consider renaming it to 'isUiNodeDivisionAttributes' for consistency.

export function isUiNodeDivAttributes(