chore: add build-dev script

Author: nakrovati

frameworks/keyed/bdc/package.json

@@ -24,6 +24,7 @@
     "@rollup/plugin-node-resolve": "7.1.3"
   },
   "scripts": {
+    "build-dev": "rollup -c --watch",
     "build-prod": "rollup -c"
   }
 }

frameworks/non-keyed/bdc/package.json

@@ -24,6 +24,7 @@
     "@rollup/plugin-node-resolve": "7.1.3"
   },
   "scripts": {
+    "build-dev": "rollup -c --watch",
     "build-prod": "rollup -c"
   }
 }