feat: Initialize backend with Express and MySQL, and restructure frontend with new routing and language support.

frontend/src/styles/main.scss

@@ -0,0 +1,15 @@
+// ========================
+// MAIN SCSS FILE
+// ========================
+
+// Base styles
+@use 'global';
+
+// Components
+@use 'components/header';
+@use 'components/hero';
+@use 'components/about';
+@use 'components/skills';
+@use 'components/projects';
+@use 'components/education';
+@use 'components/contact';