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/package.json

@@ -2,7 +2,18 @@
   "name": "@capire/orders",
   "version": "1.0.0",
   "dependencies": {
+    "@cap-js/hana": "^1",
     "@capire/common": "*",
-    "@sap/cds": ">=5"
+    "@sap/cds": ">=5",
+    "@sap/xssec": "^4"
+  },
+  "cds": {
+    "requires": {
+      "messaging": true,
+      "db": true
+    }
+  },
+  "scripts": {
+    "start": "cds-serve"
   }
-}
+}