Vendor computational resources widgets from awb (#217)

* Vendor computational resources widgets from awb

* Add tests

* start.py: add link to the computer setup notebook

Author: yakutovicha

code_setup.ipynb

@@ -158,8 +158,8 @@
    "outputs": [],
    "source": [
     "import ipywidgets as ipw\n",
-    "from aiidalab_widgets_base.computational_resources import ResourceSetupBaseWidget\n",
-    "from aiidalab_widgets_base.utils import StatusHTML\n",
+    "\n",
+    "from home.computational_resources import ResourceSetupBaseWidget, StatusHTML\n",
     "\n",
     "setup_message = StatusHTML(clear_after=15)\n",
     "\n",