feat(lesson): add lesson modal

src/components/LessonSkeleton.tsx

@@ -0,0 +1,11 @@
+import { Card, CardContent } from "./ui/card";
+
+export const LessonSkeleton = () => (
+  <Card className="py-0 pb-5 rounded-4xl overflow-hidden animate-pulse">
+    <div className="w-full h-48 bg-muted" />
+    <CardContent className="space-y-2 pt-4">
+      <div className="h-5 w-2/3 bg-muted rounded" />
+      <div className="h-4 w-1/2 bg-muted rounded" />
+    </CardContent>
+  </Card>
+);