Adds auto-loading of previous configuration on startup

Implements a new feature to automatically load the previously saved environment when the UI is launched.

This improves user experience by restoring the last saved configuration, including selected applications and drivers, eliminating the need to manually reload them on each run.

The process loads the main `FFUConfig.json` and then proceeds to load associated Winget, BYO App, and Driver lists if they are defined. UI elements and checkboxes are updated accordingly to reflect the loaded state.

FFUDevelopment/BuildFFUVM_UI.ps1

@@ -126,6 +126,14 @@ $window.Add_Loaded({
         Initialize-UIDefaults -State $script:uiState
         Initialize-DynamicUIElements -State $script:uiState
         Register-EventHandlers -State $script:uiState
+
+        # Attempt automatic load of previous environment (silent)
+        try {
+            Invoke-AutoLoadPreviousEnvironment -State $script:uiState
+        }
+        catch {
+            WriteLog "Auto-load previous environment failed: $($_.Exception.Message)"
+        }
     })