feat: Add offline resource of fonts and lib

replaced CDN links with offline resource

Signed-off-by: Pranav C <61551451+pranavxc@users.noreply.github.com>

packages/nc-gui/config/vuetify.options.js

@@ -1,7 +1,11 @@
 import colors from 'vuetify/es5/util/colors';
+import '@mdi/font/css/materialdesignicons.css' // Ensure you are using css-loader
 
 export default function ({app}) {
   return {
+    icons: {
+      iconfont: 'mdi', // default - only for display purposes
+    },
     theme: {
       options: {
         customProperties: true,