feat: MCP servers open in a drawer on mobile now

[nickytonline]

Now MCP servers are loaded in a drawer component on smaller screens.

Closes #84

This pull request introduces several updates to the codebase, including adding a new dependency for popovers, implementing a reusable popover component, and enhancing the Chat component with a new server selector UI. The changes improve functionality and maintainability by centralizing popover logic and refining the user interface.

Dependency Updates:

• Added @radix-ui/react-popover to the package.json dependencies to enable popover functionality.

Component Enhancements:

• Implemented a reusable popover component in src/components/ui/popover.tsx, including Popover, PopoverTrigger, PopoverContent, and PopoverAnchor components. These components use Radix UI primitives and provide consistent styling and behavior for popovers.

UI Improvements:

• Updated the Chat component in src/components/Chat.tsx to include a server selector wrapped in a styled container, enhancing the user interface for server management.

Optional Dependency Adjustments:

• Reorganized the optionalDependencies section in package.json to ensure consistent formatting and inclusion of the latest versions of lightningcss for various platforms.