Add example for starting cds with ts-node

hello/package.json

@@ -2,6 +2,7 @@
   "name": "@capire/hello-world",
   "version": "1.0.0",
   "scripts": {
-    "watch": "cds serve world.cds"
+    "watch": "cds serve world.cds",
+    "watch:ts": "npx ts-node ../node_modules/@sap/cds/bin/cds serve world.cds"
   }
-}
+}

hello/world.ts

@@ -0,0 +1,5 @@
+module.exports = class say {
+    hello(req: any) {
+        return `Hello ${req.data.to} from a typescript file!`
+    }
+}