feat: index.ts: export EmojiAvatar and emojiAvatarForAddress (#2491)

[drichelson]

Aspirational PR assuming this feature seems reasonable: #2491

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PR-Codex overview

This PR focuses on exporting two new components, EmojiAvatar and emojiAvatarForAddress, from the rainbowkit package, enhancing its functionality.

Detailed summary

• Updated the version of @rainbow-me/rainbowkit to minor.
• Exported EmojiAvatar from ./components/Avatar/EmojiAvatar.
• Exported emojiAvatarForAddress from ./components/Avatar/emojiAvatarForAddress.

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[changeset-bot]

🦋 Changeset detected

Latest commit: b42337b

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 19 packages

Name	Type
@rainbow-me/rainbowkit	Minor
example	Patch
@rainbow-me/rainbow-button	Patch
@rainbow-me/rainbowkit-siwe-next-auth	Major
rainbowkit-next-app	Patch
site	Patch
with-create-react-app	Patch
with-next-app-i18n	Patch
with-next-app	Patch
with-next-custom-button	Patch
with-next-mint-nft	Patch
with-next-siwe-iron-session	Patch
with-next-siwe-next-auth	Patch
with-next-wallet-button	Patch
with-next	Patch
with-react-router	Patch
with-remix	Patch
with-vite	Patch
with-next-rainbow-button	Patch

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[Copilot]

Pull Request Overview

This PR exports two emoji avatar utilities from the RainbowKit package's public API to enable external consumers to use emoji avatar functionality directly.

• Exports the EmojiAvatar component for rendering emoji-based avatars
• Exports the emojiAvatarForAddress utility function for generating emoji avatars from addresses

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