Rely on dart pub add in GenUI getting started

[parlough]

For a simpler developer experience and to avoid needing updates.

[gemini-code-assist]

Summary of Changes

Hello @parlough, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the GenUI getting started documentation by modernizing the instructions for adding Dart/Flutter package dependencies. It transitions from advising manual edits to the pubspec.yaml file to recommending the use of the dart pub add command, which is the preferred and more convenient method for managing dependencies. This change enhances the clarity and user-friendliness of the setup guide for developers.

Highlights

• Dependency Management: The documentation for getting started with GenUI now recommends using the dart pub add command for installing genui and genui_firebase_ai, replacing the previous manual pubspec.yaml editing instructions.
• Custom Widget Setup: Instructions for adding custom widgets have been updated to utilize dart pub add json_schema_builder for dependency installation, streamlining the process.

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[gemini-code-assist]

Code Review

This pull request updates the 'Get started' documentation to recommend using dart pub add for adding dependencies, which is a good practice that simplifies the setup process. While this is a positive change, I have identified a potential issue where the simplification might have removed a crucial detail about version compatibility for an experimental package. My review comment highlights this concern to ensure the documentation remains accurate and helps users avoid potential dependency conflicts.

[sfshaza2]

thx! lgtm

[flutter-website-bot]

Visit the preview URL for this PR (updated for commit 5095e64):

https://flutter-docs-prod--pr12720-misc-genui-use-dart-pub-add-f8fjzxqs.web.app