fix(component): add schematic assets to ng-package.json

Closes #2819

Author: wingy3181

modules/component/ng-package.json

@@ -1,6 +1,7 @@
 {
   "$schema": "../../node_modules/ng-packagr/ng-package.schema.json",
   "dest": "../../dist/modules/component",
+  "assets": ["migrations/**/*.json", "schematics/**/*.json", "**/files"],
   "lib": {
     "entryFile": "index.ts"
   }