Refactor useToast hook

The useToast hook was refactored into smaller, more manageable files to improve code organization and maintainability.

src/components/AddTransactionButton.tsx

@@ -1,3 +1,4 @@
+
 import React, { useState } from 'react';
 import { PlusIcon } from 'lucide-react';
 import { Dialog, DialogContent, DialogHeader, DialogTitle } from './ui/dialog';