REFACTOR(repo): simplify project structure

- Move services/nextjs to nextjs/
- Move deploy/docker/Dockerfile.prod to Dockerfile
- Add GitHub Actions workflows (ci.yml, build.yml)
- Remove deploy/, services/, scripts/ folders

nextjs/src/entities/todo/ui/TodoList.tsx

@@ -0,0 +1,53 @@
+'use client'
+
+import { TodoItem } from './TodoItem'
+import { useTodoStore, useFilteredTodos } from '../model/store'
+import { Spinner } from '@/shared/ui/spinner'
+
+export function TodoList() {
+  const { updateTodo, deleteTodo, toggleTodo, isLoading, error } = useTodoStore()
+  const filteredTodos = useFilteredTodos()
+
+  if (isLoading) {
+    return (
+      <div className="flex items-center justify-center p-8">
+        <Spinner />
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="text-center p-8 text-destructive">
+        {error}
+      </div>
+    )
+  }
+
+  if (filteredTodos.length === 0) {
+    return (
+      <div className="text-center p-8 text-muted-foreground">
+        할 일이 없습니다
+      </div>
+    )
+  }
+
+  const handleUpdate = async (id: string, title: string, description?: string) => {
+    await updateTodo(id, { title, description })
+  }
+
+  return (
+    <div className="flex flex-col gap-2">
+      {filteredTodos.map((todo) => (
+        <TodoItem
+          key={todo.id}
+          todo={todo}
+          onToggle={toggleTodo}
+          onDelete={deleteTodo}
+          onUpdate={handleUpdate}
+        />
+      ))}
+    </div>
+  )
+}
+