Add Quick Reactions Picker to emoji-mart

[dev-archie-ai-code-explain-pr]

• The user prefers the look and feel of the emoji-mart library over emoji-picker-react, but would like to see a "quick reactions" picker feature similar to what is available in emoji-picker-react.
• This feature is commonly seen in other popular applications like Slack, LinkedIn, and Jira, where users can quickly select frequently used emojis.
• The user would like to know if this feature is on the roadmap for emoji-mart, or if there is a simple way to implement it themselves.