first commit i guess

ViewModel/MainViewModel.cs

@@ -0,0 +1,34 @@
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Windows.Input;
+using NoteApp.Model;
+using NoteApp.Service;
+using NoteApp.View;
+
+public class MainViewModel : INotifyPropertyChanged {
+    private readonly FileService _fileService;
+    private readonly INavigation _navigation;
+
+    public ObservableCollection<Note> Notes { get; set; } = [];
+
+    public ICommand LoadNoteCmd {get;}
+
+    public MainViewModel(FileService fileService, INavigation navigation){
+        _fileService = fileService;
+        _navigation = navigation;
+
+        LoadNotes().Wait();
+
+        LoadNoteCmd = new Command<Note>(async (note) => await LoadNote(note));
+    }
+
+    private async Task LoadNotes(){
+        Notes = await _fileService.LoadNotes();
+    }
+
+    private async Task LoadNote(Note note){
+        await _navigation.PushAsync(new NotePage(note));
+    }
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+}