chore: create frontend project from boilerplate

frontend/src/components/ai-elements/toolbar.tsx

@@ -0,0 +1,16 @@
+import { cn } from "@/lib/utils";
+import { NodeToolbar, Position } from "@xyflow/react";
+import type { ComponentProps } from "react";
+
+type ToolbarProps = ComponentProps<typeof NodeToolbar>;
+
+export const Toolbar = ({ className, ...props }: ToolbarProps) => (
+  <NodeToolbar
+    className={cn(
+      "flex items-center gap-1 rounded-sm border bg-background p-1.5",
+      className
+    )}
+    position={Position.Bottom}
+    {...props}
+  />
+);