chore(admin-ui): Set sass includePath

admin-ui/angular.json

@@ -31,7 +31,10 @@
               "./node_modules/@clr/icons/clr-icons.min.css",
               "./node_modules/@clr/ui/clr-ui.min.css"
             ],
-            "scripts": []
+            "scripts": [],
+            "stylePreprocessorOptions": {
+              "includePaths": ["./src"]
+            }
           },
           "configurations": {
             "production": {