Docs: Add Rsbuild Storybook builder to builders page

[fi3ework]

Add Rsbuild Storybook Builder to the builder page, this is the official Storybook integration of Rspack ecosystem. Feel free to come up with any comment or suggestions. 😀

Related PR: storybookjs/web#268.

What I did

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

This section is mandatory for all contributions. If you believe no manual test is necessary, please state so explicitly. Thanks!

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli-storybook/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

🦋 Canary release

This PR does not have a canary release associated. You can request a canary release of this pull request by mentioning the @storybookjs/core team here.

core team members can create a canary release here or locally with gh workflow run --repo storybookjs/storybook canary-release-pr.yml --field pr=<PR_NUMBER>

Greptile Summary

This PR adds the Rspack/Rsbuild builder to Storybook's builders documentation, providing users with information about this bundling option alongside the existing Webpack and Vite builders.

• Added Rspack/Rsbuild builder to docs/builders/index.mdx as a third bundling option
• Highlighted Rspack's "blazing fast" performance as a key feature
• Included link to the official GitHub repository (rspack-contrib/storybook-rsbuild)
• Maintained consistent documentation format with existing builder options

_{💡 (1/5) You can manually trigger the bot by mentioning @greptileai in a comment!}

[greptile-apps]

LGTM

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[greptile-apps]

LGTM

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit f296f66.

Command	Status	Duration	Result
nx run-many -t build --parallel=3	✅ Succeeded	1m 57s	View ↗

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☁️ Nx Cloud last updated this comment at 2025-02-27 03:36:54 UTC

[kylegach]

Thanks, @fi3ework! This is a great idea. 👍

[kylegach]

Not sure why CI is failing, but this is a trivial docs-only change that I manually verified is formatted correctly, so I'm going to merge anyway.