feat: add frontend + backend + database to retrieve and compute news from Yahoo

frontend/src/components/ui/button.tsx

@@ -0,0 +1,35 @@
+import { forwardRef, type ButtonHTMLAttributes } from 'react'
+import { cva, type VariantProps } from 'class-variance-authority'
+import { cn } from '@/lib/cn'
+
+const buttonVariants = cva(
+  'inline-flex items-center justify-center gap-2 rounded-md text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50',
+  {
+    variants: {
+      variant: {
+        default: 'bg-primary text-primary-foreground hover:bg-primary/90',
+        destructive: 'bg-destructive text-destructive-foreground hover:bg-destructive/90',
+        outline: 'border border-input bg-transparent hover:bg-accent hover:text-accent-foreground',
+        secondary: 'bg-secondary text-secondary-foreground hover:bg-secondary/80',
+        ghost: 'hover:bg-accent hover:text-accent-foreground',
+        link: 'text-primary underline-offset-4 hover:underline',
+      },
+      size: {
+        default: 'h-9 px-4 py-2',
+        sm: 'h-8 rounded-md px-3 text-xs',
+        lg: 'h-10 rounded-md px-8',
+        icon: 'h-9 w-9',
+      },
+    },
+    defaultVariants: { variant: 'default', size: 'default' },
+  }
+)
+
+export interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement>, VariantProps<typeof buttonVariants> {}
+
+export const Button = forwardRef<HTMLButtonElement, ButtonProps>(
+  ({ className, variant, size, ...props }, ref) => (
+    <button className={cn(buttonVariants({ variant, size, className }))} ref={ref} {...props} />
+  )
+)
+Button.displayName = 'Button'