Improve Documentation clarity of Vite Framework limitations for test-addon

[SpanishPear]

This confused myself and at least one other on the Storybook Discord - so updating the wording to a bit more explicit :)

Relevant messages here

What I did

Clarify that test-addon works with all Vite frameworks, not just vue3-vite.

Checklist for Contributors

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

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Greptile Summary

Updates documentation to clarify that the test-addon is compatible with all Vite-based frameworks, not just vue3-vite, in the test-addon documentation.

• Modified /docs/writing-tests/test-addon.mdx to explicitly mention react-vite alongside vue3-vite as examples of supported frameworks
• Improves clarity by removing potential ambiguity about Vite framework support

[greptile-apps]

LGTM

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[shilman]

Thank you @SpanishPear !!