basic csv loader, transaction list & half done stats page

lib/pages/startup/startup_page.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+
+class StartupPage extends StatelessWidget {
+  const StartupPage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const Scaffold(
+      body: Center(
+        child: Column(
+          children: [
+            CircularProgressIndicator(
+              value: 5,
+            ),
+            Text('Chargement...')
+          ],
+        ),
+      ),
+    );
+  }
+}