chore: import upstream snapshot with attribution

examples/integrations/ms-agent-framework-dotnet/src/components/ui/button.tsx

@@ -0,0 +1,52 @@
+import * as React from "react";
+import { cva } from "class-variance-authority";
+import type { VariantProps } from "class-variance-authority";
+import { cn } from "@/lib/utils";
+
+const buttonVariants = cva(
+  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-[var(--radius)] text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[var(--ring)] disabled:pointer-events-none disabled:opacity-50 cursor-pointer",
+  {
+    variants: {
+      variant: {
+        default:
+          "bg-[var(--primary)] text-[var(--primary-foreground)] hover:opacity-90",
+        secondary:
+          "bg-[var(--secondary)] text-[var(--secondary-foreground)] hover:opacity-80",
+        outline:
+          "border border-[var(--border)] bg-[var(--background)] hover:bg-[var(--secondary)]",
+        ghost:
+          "hover:bg-[var(--secondary)] hover:text-[var(--secondary-foreground)]",
+        destructive:
+          "bg-[var(--destructive)] text-[var(--destructive-foreground)] hover:opacity-90",
+      },
+      size: {
+        default: "h-9 px-4 py-2",
+        sm: "h-8 rounded-md px-3 text-xs",
+        lg: "h-10 rounded-md px-6",
+        icon: "h-9 w-9",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  },
+);
+
+export interface ButtonProps
+  extends
+    React.ButtonHTMLAttributes<HTMLButtonElement>,
+    VariantProps<typeof buttonVariants> {}
+
+const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
+  ({ className, variant, size, ...props }, ref) => (
+    <button
+      className={cn(buttonVariants({ variant, size, className }))}
+      ref={ref}
+      {...props}
+    />
+  ),
+);
+Button.displayName = "Button";
+
+export { Button, buttonVariants };