Feature: Lazy loading

Lazy loaded everything
TODO: The cash flow module when clicking on sub-links, it reloads the whole page, it needs to be diagnosed and fixed, this problem also exists in the other modules
TODO: Rename folders and modules such as account to accounts to match the url

overlord/src/app/closing-stock/closing-stock-routing.module.ts

@@ -7,7 +7,7 @@ import {ClosingStockComponent} from './closing-stock.component';
 
 const closingStockRoutes: Routes = [
   {
-    path: 'ClosingStock',
+    path: '',
     component: ClosingStockComponent,
     canActivate: [AuthGuard],
     data: {
@@ -18,7 +18,7 @@ const closingStockRoutes: Routes = [
     }
   },
   {
-    path: 'ClosingStock/:date',
+    path: ':date',
     component: ClosingStockComponent,
     canActivate: [AuthGuard],
     data: {