Add localization support and refactor menus

- Implemented LocalizationManager for handling multiple languages.
- Updated LoadGameMenu, MainMenu, PauseMenu, and SettingsMenu to support localization.
- Added InstanceSelectionMenu for selecting game instances.
- Refactored SaveManager to handle new SaveInstance structure.
- Created SaveDialog for saving games with user-defined names.
- Enhanced SaveData to manage multiple save instances.
- Added error handling and logging for save/load operations.
- Updated UI elements to reflect localized text.

scripts/SaveDialog.cs

@@ -0,0 +1,101 @@
+using Godot;
+
+namespace TheGame
+{
+    public partial class SaveDialog : AcceptDialog
+    {
+        private LineEdit _nameInput;
+        private Game _gameController;
+        
+        public override void _Ready()
+        {
+            // Sätt process mode så att dialogen fungerar när spelet är pausat
+            ProcessMode = ProcessModeEnum.WhenPaused;
+            
+            var loc = LocalizationManager.Instance;
+            Title = loc.GetText("save_dialog_title");
+            
+            // Skapa innehåll för dialogen
+            var vbox = new VBoxContainer();
+            
+            var label = new Label();
+            label.Text = loc.GetText("save_dialog_enter_name");
+            vbox.AddChild(label);
+            
+            _nameInput = new LineEdit();
+            _nameInput.PlaceholderText = loc.GetText("save_dialog_placeholder");
+            _nameInput.Text = $"Save {System.DateTime.Now:yyyy-MM-dd HH:mm}";
+            vbox.AddChild(_nameInput);
+            
+            AddChild(vbox);
+            
+            // Sätt process mode på alla child nodes
+            SetProcessModeRecursive(this, ProcessModeEnum.WhenPaused);
+            
+            // Anslut signaler
+            Confirmed += OnSaveConfirmed;
+            
+            // Fokusera på text input
+            _nameInput.GrabFocus();
+            _nameInput.SelectAll();
+        }
+        
+        public void Initialize(Game gameController)
+        {
+            _gameController = gameController;
+        }
+        
+        private void OnSaveConfirmed()
+        {
+            if (_gameController != null)
+            {
+                string saveName = _nameInput.Text.Trim();
+                if (string.IsNullOrEmpty(saveName))
+                {
+                    saveName = $"Save {System.DateTime.Now:yyyy-MM-dd HH:mm}";
+                }
+                
+                var saveManager = new SaveManager();
+                float currentTime = _gameController.GetGameTime();
+                saveManager.SaveGame(currentTime, saveName);
+                
+                // Stäng pausmenyn och återgå till spelet
+                _gameController.TogglePause();
+            }
+            
+            QueueFree();
+        }
+        
+        private void SetProcessModeRecursive(Node node, ProcessModeEnum mode)
+        {
+            if (node is Control control)
+            {
+                control.ProcessMode = mode;
+            }
+            
+            foreach (Node child in node.GetChildren())
+            {
+                SetProcessModeRecursive(child, mode);
+            }
+        }
+        
+        public override void _Input(InputEvent @event)
+        {
+            // Se till att input fungerar när spelet är pausat
+            if (@event is InputEventKey keyEvent && keyEvent.Pressed)
+            {
+                if (keyEvent.Keycode == Key.Enter || keyEvent.Keycode == Key.KpEnter)
+                {
+                    OnSaveConfirmed();
+                    GetViewport().SetInputAsHandled();
+                }
+                else if (keyEvent.Keycode == Key.Escape)
+                {
+                    Hide();
+                    QueueFree();
+                    GetViewport().SetInputAsHandled();
+                }
+            }
+        }
+    }
+}