fix: resolve Prettier markdown code block parsing errors

- Fix syntax errors in skills markdown files (.github/skills, .opencode/skills)
- Change typescript to tsx for code blocks with JSX
- Replace ellipsis (...) in array examples with valid syntax
- Separate CSS from TypeScript into distinct code blocks
- Convert JavaScript object examples to valid JSON in docs
- Fix enum definitions with proper comma separation

.opencode/skills/vercel-react-best-practices/rules/server-cache-lru.md

@@ -12,20 +12,20 @@ tags: server, cache, lru, cross-request
 **Implementation:**
 
 ```typescript
-import { LRUCache } from 'lru-cache'
+import { LRUCache } from "lru-cache";
 
 const cache = new LRUCache<string, any>({
   max: 1000,
-  ttl: 5 * 60 * 1000  // 5 minutes
-})
+  ttl: 5 * 60 * 1000, // 5 minutes
+});
 
 export async function getUser(id: string) {
-  const cached = cache.get(id)
-  if (cached) return cached
+  const cached = cache.get(id);
+  if (cached) return cached;
 
-  const user = await db.user.findUnique({ where: { id } })
-  cache.set(id, user)
-  return user
+  const user = await db.user.findUnique({ where: { id } });
+  cache.set(id, user);
+  return user;
 }
 
 // Request 1: DB query, result cached