Swagger: Enable comment parsing

Signed-off-by: David Mehren <git@herrmehren.de>

nest-cli.json

@@ -2,6 +2,13 @@
   "collection": "@nestjs/schematics",
   "sourceRoot": "src",
   "compilerOptions": {
-    "plugins": ["@nestjs/swagger/plugin"]
+    "plugins": [
+      {
+        "name": "@nestjs/swagger",
+        "options": {
+          "introspectComments": true
+        }
+      }
+    ]
   }
 }