Add Mode3 with QB Web Connector SOAP integration and credit card charge management

ModeSwitch/activeMode.txt

@@ -1 +1 @@
-Mode2Svelte
+Mode3

ModeSwitch/backend/orchestrator.ts

@@ -13,6 +13,7 @@ const MODE_FOLDERS: Record<string, string> = {
   'Mode1': 'Mode1',
   'Mode1Svelte': 'Mode1Svelte',
   'Mode2Svelte': 'Mode2Svelte',
+  'Mode3': 'Mode3',
   'Mode6Test': 'Mode6Test',
 };