#38098 chore: Update JoyPixels emoji icons

Proposed changes

Updates the emoji-toolkit dependency from v7.0.1 to v9.0.0, which includes support for newer Unicode 15.1 emojis.

Note:

After investigating the codebase, I found that a complete emoji update would require more extensive changes:

• The codebase currently imports from the legacy emojione package
• CSS class names use emojione-* prefix (would need to change to joypixels-*)
• Multiple files in apps/meteor/app/emoji-emojione/ would need refactoring

This PR updates the emoji-toolkit package version as a first step. Full migration may require additional work.

Issue(s)

Closes #31069

Steps to test

1. Run yarn to install dependencies
2. Start the development server
3. Open emoji picker and verify it still works

Checklist

• I have read the Contributing Guide
• I have signed the CLA
• Includes changeset

Summary by CodeRabbit

• New Features
  • Updated emoji library to provide access to the latest emoji options and expanded emoji support for enhanced messaging.

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