Add the tomli library and create the config_manager.py to manage the configuration file and also add the dependency injection on the ui.py via the Application class

src/pilgrim/utils/__init__.py

@@ -1,3 +1,4 @@
 from .directory_manager import DirectoryManager
+from .config_manager import ConfigManager
 
-__all__ = ['DirectoryManager']
+__all__ = ['DirectoryManager', 'ConfigManager']