Use @use instead of @import in base.scss

Replaced `@import` with `@use` for improved modularity and compatibility with modern Sass practices. This change ensures better scoping and avoids potential conflicts with styles from other files.

frontend/src/assets/styles/base.scss

@@ -1,2 +1,2 @@
-@import "@fontsource/roboto";
+@use "@fontsource/roboto";
-@import "fork-awesome/css/fork-awesome.min.css";
+@use "fork-awesome/css/fork-awesome.min.css";