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/rendering-hoist-jsx.md

@@ -13,31 +13,21 @@ Extract static JSX outside components to avoid re-creation.
 
 ```tsx
 function LoadingSkeleton() {
-  return <div className="animate-pulse h-20 bg-gray-200" />
+  return <div className="animate-pulse h-20 bg-gray-200" />;
 }
 
 function Container() {
-  return (
-    <div>
-      {loading && <LoadingSkeleton />}
-    </div>
-  )
+  return <div>{loading && <LoadingSkeleton />}</div>;
 }
 ```
 
 **Correct (reuses same element):**
 
 ```tsx
-const loadingSkeleton = (
-  <div className="animate-pulse h-20 bg-gray-200" />
-)
+const loadingSkeleton = <div className="animate-pulse h-20 bg-gray-200" />;
 
 function Container() {
-  return (
-    <div>
-      {loading && loadingSkeleton}
-    </div>
-  )
+  return <div>{loading && loadingSkeleton}</div>;
 }
 ```