Deploy on BTP (#793)

minimal changes required to deploy the CAP samples in _shared db_ mode:
- db: all bookshop, orders, reviews CDS models into one db instance (_shared-db_)
- services: bookstore, orders, reviews
- approuter with UI symlinks:
  - Vue: bookshop, reviews
  - Fiori: orders
 - authentification: xsuaa
 - messaging: Event Mesh
 - destinations: orders, reviews
- cds:
  - projection OrdersNoDraft for backend direct access
  - event OrderChanged
- deployment: mta.yml

orders/srv/orders-service.cds

@@ -2,4 +2,14 @@ using { sap.capire.orders as my } from '../db/schema';
 
 service OrdersService {
   entity Orders as projection on my.Orders;
+
+  @odata.draft.bypass
+  @(requires: 'system-user')
+  entity OrdersNoDraft as projection on my.Orders;
+
+  event OrderChanged {
+    product: String;
+    deltaQuantity: Integer;
+  }
+
 }