feat: Add mention + auto complete feature prompt query

[IonesioJunior]

Summary

This update integrates a wide range of Radix UI components into the project, enhancing UI consistency and interactivity. It includes component implementations for popovers, hover cards, and various Radix primitives, along with the necessary dependency updates.

Changes

• Added @radix-ui dependencies to package.json and package-lock.json.
• Implemented Popover, HoverCard, and related UI components for consistent UI patterns.
• Updated existing components to support new Radix UI components.
• Enhanced mention handling with new hooks for better source selection and synchronization.
• Modified package.json to include the new Radix UI version.
• Adjusted chat and hero components to support mention auto-complete with popovers.
• Updated context-selection-store to track mention-originated sources for sync.

Technical notes

• The new components improve accessibility and UX by providing standardized overlays and tooltips.
• Mention handling now supports more robust source management, improving sync accuracy.
• Dependencies are pinned to @radix-ui v1.4.3 for stability.