feat(component): Adds SmartScrollbar to ui-next - OHIF-2558 (#5924)

Co-authored-by: Joe Boccanfuso <joe.boccanfuso@radicalimaging.com>

platform/ui-next/package.json

@@ -17,6 +17,8 @@
     "start": "yarn run build --watch",
     "dev": "cross-env NODE_ENV=development webpack serve --config .webpack/webpack.playground.js",
     "test": "echo \"Error: no test specified\" && exit 1",
+    "test:unit": "jest --watchAll",
+    "test:unit:ci": "jest --ci --runInBand --collectCoverage",
     "build": "cross-env NODE_ENV=production webpack --config .webpack/webpack.prod.js",
     "build:package": "yarn run build"
   },