feat: turbostarter boilerplate

Production-ready Next.js boilerplate with:
- Runtime env validation (fail-fast on missing vars)
- Feature-gated config (S3, Stripe, email, OAuth)
- Docker + Coolify deployment pipeline
- PostgreSQL + pgvector, MinIO S3, Better Auth
- TypeScript strict mode (no ignoreBuildErrors)
- i18n (en/es), AI modules, billing, monitoring

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/ui/mobile/src/components/skeleton.tsx

@@ -0,0 +1,42 @@
+import * as React from "react";
+import Animated, {
+  useAnimatedStyle,
+  useSharedValue,
+  withRepeat,
+  withSequence,
+  withTiming,
+} from "react-native-reanimated";
+
+import { cn } from "@turbostarter/ui";
+
+const duration = 1000;
+
+function Skeleton({
+  className,
+  style,
+  ...props
+}: React.ComponentPropsWithoutRef<typeof Animated.View>) {
+  const sv = useSharedValue(1);
+
+  React.useEffect(() => {
+    sv.value = withRepeat(
+      withSequence(withTiming(0.5, { duration }), withTiming(1, { duration })),
+      -1,
+    );
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
+  const animatedStyle = useAnimatedStyle(() => ({
+    opacity: sv.value,
+  }));
+
+  return (
+    <Animated.View
+      style={[animatedStyle, style]}
+      className={cn("bg-secondary dark:bg-muted rounded-md", className)}
+      {...props}
+    />
+  );
+}
+
+export { Skeleton };