Fix Avatar component TypeScript errors

Add cn.ts file to fix @/cn import error

Fix cn import path in src\utils\cn.ts

Fix cn import path in src\types\api.ts

Fix cn import path in src\lib\utils\validators.ts

Fix cn import path in src\lib\utils\index.ts

Fix cn import path in src\lib\constants\api.ts

Fix cn import path in src\lib\utils.ts

Fix cn import path in src\lib\api-client.ts

Fix cn import path in src\hooks\useApi.ts

Fix cn import path in src\context\ThemeContext.tsx

Fix cn import path in src\context\AuthContext.tsx

Fix cn import path in src\components\templates\DashboardTemplate\index.tsx

Fix cn import path in src\components\templates\index.ts

Fix cn import path in src\components\organisms\Sidebar\index.tsx

Fix cn import path in src\components\organisms\PicoForm\index.tsx

Fix cn import path in src\components\organisms\PaperGrid\index.tsx

Fix cn import path in src\components\organisms\Header\index.tsx

Fix cn import path in src\components\organisms\Navigation.tsx

Fix cn import path in src\components\organisms\index.ts

Fix cn import path in src\components\molecules\StatCard\index.tsx

Fix cn import path in src\components\molecules\SearchBar\index.tsx

Fix cn import path in src\components\molecules\PaperCard\index.tsx

Fix cn import path in src\components\molecules\NotificationItem\index.tsx

Fix cn import path in src\components\molecules\LogoUploader\index.tsx

Fix cn import path in src\components\molecules\FilterChips\index.tsx

Fix cn import path in src\components\molecules\index.ts

Fix cn import path in src\components\auth\AuthGuard.tsx

Fix cn import path in src\components\atoms\Tooltip\index.tsx

Fix cn import path in src\components\atoms\StatCard\index.tsx

Fix cn import path in src\components\atoms\Spinner\index.tsx

Fix cn import path in src\components\atoms\Input\index.tsx

Fix cn import path in src\components\atoms\Icon\index.tsx

Fix cn import path in src\components\atoms\Button\index.tsx

Fix cn import path in src\components\atoms\Badge\index.tsx

Fix cn import path in src\components\atoms\Avatar\index.tsx

Fix cn import path in src\components\atoms\index.ts

Fix cn import path in src\app\register\page.tsx

Fix cn import path in src\app\login\page.tsx

Fix cn import path in src\app\(dashboard)\settings\page.tsx

Fix cn import path in src\app\(dashboard)\pico\page.tsx

Fix cn import path in src\app\(dashboard)\library\page.tsx

Fix cn import path in src\app\(dashboard)\explore\page.tsx

Fix cn import path in src\app\(dashboard)\editor\page.tsx

Fix cn import path in src\app\(dashboard)\layout.tsx

Fix cn import path in src\app\page.tsx

Fix cn import path in src\app\not-found.tsx

Fix cn import path in src\app\layout.tsx

Fix cn import path in src\app\globals.css

Add alembic\versions\init__.py