feat(ui): add ButtonLink component

[pasqualevitiello]

Summary by cubic

Add ButtonLink for links styled as buttons, and replace existing navigational actions to use it for proper anchor semantics. Addresses Linear CUI-74 by introducing a dedicated link component with shared Button styling, updated docs, and registry support.

• New Features

  • Added ButtonLink with the same variants/sizes as Button, rendering an anchor by default or a custom Link via render.
  • Updated Button docs with ButtonLink usage and API; added registry entries and CLI support; updated the p-button-17 example to demonstrate native and Next.js Link usage.
  • Switched docs page actions, main nav items, GitHub link, and site CTA to ButtonLink.

• Refactors

  • Button now wraps the Base UI Button primitive for simpler, consistent behavior, with ref forwarding and focusableWhenDisabled support.
  • Upgraded @base-ui-components/react to ^1.0.0-rc.0; marked pagination components as client.
  • Cleaned up minor Alert styles.

^{Written for commit d3a196a. Summary will update automatically on new commits.}

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Project	Deployment	Preview	Comments	Updated (UTC)
coss-com	Ready	Preview	Comment	Dec 5, 2025 3:47pm
coss-com-ui	Ready	Preview	Comment	Dec 5, 2025 3:47pm

1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
coss-com-origin	Skipped			Dec 5, 2025 3:47pm