feat: add UI components and utilities

- Introduced Skeleton component for loading states.
- Added Slider component with customizable properties.
- Implemented Sonner for toast notifications with icons.
- Created Spinner component for loading indicators.
- Developed Switch component for toggle functionality.
- Added Table component with subcomponents for structured data display.
- Implemented Tabs component for tabbed navigation.
- Created Textarea component for multi-line text input.
- Developed ToggleGroup and Toggle components for grouped toggle functionality.
- Added Tooltip component for contextual hints.
- Implemented useIsMobile hook for responsive design.
- Updated global styles with Tailwind CSS and custom properties.
- Added utility functions for class name management.
- Configured TypeScript paths for easier imports.
- Updated Vite configuration to include Tailwind CSS and path aliases.

libertas-frontend/src/hooks/use-mobile.ts

@@ -0,0 +1,19 @@
+import * as React from "react"
+
+const MOBILE_BREAKPOINT = 768
+
+export function useIsMobile() {
+  const [isMobile, setIsMobile] = React.useState<boolean | undefined>(undefined)
+
+  React.useEffect(() => {
+    const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`)
+    const onChange = () => {
+      setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    }
+    mql.addEventListener("change", onChange)
+    setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    return () => mql.removeEventListener("change", onChange)
+  }, [])
+
+  return !!isMobile
+}