This PR adds styles for separator in the action group menu
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## Summary by CodeRabbit
- **New Features**
- Enhanced menu items in the design system to support separators and
icons, improving visual organization and interaction.
- **Style**
- Updated styling for menu items with separators to improve visual
clarity.
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Co-authored-by: Pawan Kumar <pawankumar@Pawans-MacBook-Pro-2.local>
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