Add Kiro steering files, hooks, and scripts (#812)

Co-authored-by: Sungmin Hong <hsungmin@amazon.com>

.kiro/steering/typescript-patterns.md

@@ -0,0 +1,51 @@
+---
+inclusion: fileMatch
+fileMatchPattern: "*.ts,*.tsx"
+description: TypeScript and JavaScript patterns extending common rules
+---
+
+# TypeScript/JavaScript Patterns
+
+> This file extends the common patterns rule with TypeScript/JavaScript specific content.
+
+## API Response Format
+
+```typescript
+interface ApiResponse<T> {
+  success: boolean
+  data?: T
+  error?: string
+  meta?: {
+    total: number
+    page: number
+    limit: number
+  }
+}
+```
+
+## Custom Hooks Pattern
+
+```typescript
+export function useDebounce<T>(value: T, delay: number): T {
+  const [debouncedValue, setDebouncedValue] = useState<T>(value)
+
+  useEffect(() => {
+    const handler = setTimeout(() => setDebouncedValue(value), delay)
+    return () => clearTimeout(handler)
+  }, [value, delay])
+
+  return debouncedValue
+}
+```
+
+## Repository Pattern
+
+```typescript
+interface Repository<T> {
+  findAll(filters?: Filters): Promise<T[]>
+  findById(id: string): Promise<T | null>
+  create(data: CreateDto): Promise<T>
+  update(id: string, data: UpdateDto): Promise<T>
+  delete(id: string): Promise<void>
+}
+```