basic csv loader, transaction list & half done stats page

lib/pages/budgets/budgets_page.dart

@@ -0,0 +1,10 @@
+import 'package:flutter/material.dart';
+
+class BudgetsPage extends StatelessWidget {
+  const BudgetsPage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const Text('Budgets');
+  }
+}