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.

resources/languages/eng.json

@@ -0,0 +1,51 @@
+{
+  "main_menu_title": "THE GAME",
+  "main_menu_start": "Start Game",
+  "main_menu_load": "Load Game",
+  "main_menu_settings": "Settings",
+  "main_menu_exit": "Exit",
+  
+  "pause_menu_title": "PAUSED",
+  "pause_menu_resume": "Resume",
+  "pause_menu_save": "Save Game",
+  "pause_menu_settings": "Settings",
+  "pause_menu_main_menu": "Exit to Main Menu",
+  "pause_menu_desktop": "Exit to Desktop",
+  
+  "load_game_title": "LOAD GAME",
+  "load_game_back": "Back to Main Menu",
+  "load_game_no_saves": "No saved games found",
+  "load_game_playtime": "Playtime",
+  "load_game_saved": "Saved",
+  
+  "save_dialog_title": "Save Game",
+  "save_dialog_enter_name": "Enter save name:",
+  "save_dialog_placeholder": "My Save Game",
+  
+  "settings_title": "SETTINGS",
+  "settings_general": "General",
+  "settings_video": "Video",
+  "settings_audio": "Audio",
+  "settings_apply": "Apply",
+  "settings_cancel": "Cancel",
+  "settings_back": "Back",
+  
+  "settings_language": "Language",
+  
+  "settings_fullscreen": "Fullscreen",
+  
+  "settings_master_volume": "Master Volume",
+  "settings_background_volume": "Background Volume",
+  "settings_effects_volume": "Effects Volume",
+  "settings_radio_volume": "Radio Volume",
+  
+  "game_content": "GAME CONTENT HERE\\nPress ESC or click pause button to pause",
+  
+  "exit_warning_title": "Unsaved Progress",
+  "exit_warning_message": "You have unsaved progress. If you continue, all unsaved progress will be lost.\\n\\nDo you want to exit anyway?",
+  
+  "ok": "OK",
+  "cancel": "Cancel",
+  "yes": "Yes",
+  "no": "No"
+}

resources/languages/sve.json

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+{
+  "main_menu_title": "SPELET",
+  "main_menu_start": "Starta Spel",
+  "main_menu_load": "Ladda Spel",
+  "main_menu_settings": "Inställningar",
+  "main_menu_exit": "Avsluta",
+  
+  "pause_menu_title": "PAUSAD",
+  "pause_menu_resume": "Fortsätt",
+  "pause_menu_save": "Spara Spel",
+  "pause_menu_settings": "Inställningar",
+  "pause_menu_main_menu": "Tillbaka till Huvudmeny",
+  "pause_menu_desktop": "Avsluta till Skrivbord",
+  
+  "load_game_title": "LADDA SPEL",
+  "load_game_back": "Tillbaka till Huvudmeny",
+  "load_game_no_saves": "Inga sparade spel hittades",
+  "load_game_playtime": "Speltid",
+  "load_game_saved": "Sparat",
+  
+  "save_dialog_title": "Spara Spel",
+  "save_dialog_enter_name": "Ange sparnamn:",
+  "save_dialog_placeholder": "Mitt Sparade Spel",
+  
+  "settings_title": "INSTÄLLNINGAR",
+  "settings_general": "Allmänt",
+  "settings_video": "Video",
+  "settings_audio": "Ljud",
+  "settings_apply": "Tillämpa",
+  "settings_cancel": "Avbryt",
+  "settings_back": "Tillbaka",
+  
+  "settings_language": "Språk",
+  
+  "settings_fullscreen": "Helskärm",
+  
+  "settings_master_volume": "Huvudvolym",
+  "settings_background_volume": "Bakgrundsljud",
+  "settings_effects_volume": "Effekter",
+  "settings_radio_volume": "Radio",
+  
+  "game_content": "SPELINNEHÅLL HÄR\\nTryck ESC eller klicka på pausknappen för att pausa",
+  
+  "exit_warning_title": "Osparad Framsteg",
+  "exit_warning_message": "Du har osparad framsteg. Om du fortsätter kommer all osparad framsteg att förloras.\\n\\nVill du avsluta ändå?",
+  
+  "ok": "OK",
+  "cancel": "Avbryt",
+  "yes": "Ja",
+  "no": "Nej"
+}