change app name, add route calculator

lib/components/pages/calculator.dart

@@ -0,0 +1,10 @@
+import 'package:flutter/material.dart';
+import 'package:mileograph_flutter/components/calculator/calculator.dart';
+import 'package:provider/provider.dart';
+import 'package:mileograph_flutter/services/dataService.dart';
+
+class CalculatorPage extends StatelessWidget {
+  Widget build(BuildContext context) {
+    return RouteCalculatorLoader();
+  }
+}