docs(button): add LinkButton section

[geoquant]

• Summary

• Add a small LinkButton section to the Button docs page

• Add a demo showing navigation actions styled as buttons

• Reviews

• automated review not possible because: this is a small docs-only change

• Tests

• Additional testing not necessary because: this only updates docs content and demos on the existing Button page

[pkg-pr-new]

npm i https://pkg.pr.new/@cloudflare/kumo@449

commit: 2902d00

[github-actions]

Docs Preview

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Commit: 2902d00

[github-actions]

Visual Regression Report — 5 changed, 32 unchanged

5 screenshot(s) with visual changes:

Button / Basic

264 px (0.26%) changed

Before	After	Diff

Button / Loading State

4 px (0%) changed

Before	After	Diff

Dialog (Open)

0 px (0%) changed

Before	After	Diff

Select / Select Loading

0 px (0%) changed

Before	After	Diff

Select (Open)

0 px (0%) changed

Before	After	Diff

32 screenshot(s) unchanged

• Button / Variant: Primary
• Button / Variant: Secondary
• Button / Variant: Ghost
• Button / Variant: Destructive
• Button / Variant: Outline
• Button / Variant: Secondary Destructive
• Button / Sizes
• Button / With Icon
• Button / Icon Only
• Button / Disabled State
• Button / Title
• Dialog / Dialog With Actions
• Dialog / Dialog Basic
• Dialog / Dialog Alert
• Dialog / Dialog Confirmation
• Dialog / Dialog With Select
• Dialog / Dialog With Combobox
• Dialog / Dialog With Dropdown
• Select / Select Basic
• Select / Select Sizes
• Select / Select Without Label
• Select / Select With Field
• Select / Select Placeholder
• Select / Select With Tooltip
• Select / Select Custom Rendering
• Select / Select Multiple
• Select / Select Complex
• Select / Select Disabled Options
• Select / Select Disabled Items
• Select / Select Grouped
• Select / Select Grouped With Disabled
• Select / Select Long List

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Generated by Kumo Visual Regression