Extensibility Walkthrough in capire (#405)

* Extension project template

* SalesRegion ->  x_SalesRegion

* enhanced order repo

* updated package-lock.json

orders-ext/.vscode/launch.json

@@ -0,0 +1,15 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "command": "cds run --with-mocks --in-memory?",
+      "name": "cds run",
+      "request": "launch",
+      "type": "node-terminal",
+      "skipFiles": [ "<node_internals>/**" ]
+    }
+  ]
+}