style: add Sass configuration for Vue 3

Configure sass in the vue.config.js file and remove the
import of the scss file from each page. The styles are
handled by the css loaderOptions in the config file.
Every component and page has the appropriate style applied.
The appearance adjusts to the openBmc webui in Vue 2.

Change-Id: I3773c063646185b80b7bd61d05aa80a993cbd121
Signed-off-by: Surya Venkatesan <suryav@ami.com>
diff --git a/src/App.vue b/src/App.vue
index 35a743c..3a56c7c 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -35,6 +35,5 @@
 </script>
 
 <style lang="scss">
-//@import '@/assets/styles/_obmc-custom';
-//@import './assets/styles/bootstrap/_helpers.scss';
+@import '@/assets/styles/_obmc-custom';
 </style>