feat: internal component exports

[DanielSinclair]

Adds new component exports and updates the build configuration to support
separate component builds.

Changes:

• Export Avatar component with loading state support
• Export AccountModal and ChainModal components
• Add components/package.json for proper module resolution
• Update build.js to support components build
• Update src/components/index.ts with component re-exports
• Update example to use typed wallet IDs with 'as const'

This enables developers to use RainbowKit UI components individually
in custom wallet connection flows.

🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com

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PR-Codex overview

This PR focuses on enhancing the rainbowkit package by adding component exports, updating build configurations, and defining new types for Avatar and other components.

Detailed summary

• Updated package.json to include components in exports.
• Defined AvatarProps as a type in Avatar.tsx.
• Added componentsBuildOptions for building components.
• Expanded the build function to include component context.
• Updated index.ts to export new components and types, including Avatar, ConnectButton, WalletButton, and modals.

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Project	Deployment	Preview	Comments	Updated (UTC)
rainbowkit-example	Error			Dec 7, 2025 8:17am
rainbowkit-site	Ready	Preview	Comment	Dec 7, 2025 8:17am

[DanielSinclair]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• feat: internal component exports #2589 👈 (View in Graphite)
• refactor: adopt WalletFactory pattern for type-safe wallet IDs #2588
• chore: next js route types #2590
• main

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