feat: add base styles, component styles, and theme management

- Created base CSS styles for typography, layout, and transitions.
- Added component-specific styles for navigation, hero section, about section, infrastructure, projects, modal, contact, and footer.
- Introduced design tokens for consistent theming across light and dark modes.
- Implemented theme management functionality with local storage support and system preference detection.
- Configured TypeScript settings for the project.

index.html

@@ -0,0 +1,15 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="color-scheme" content="light dark" />
+    <title>Haoze Zhou</title>
+    <meta name="description" content="Haoze Zhou — CS undergraduate at Universiti Malaya. Projects and self-hosted infrastructure." />
+  </head>
+  <body>
+    <div id="app"></div>
+    <script type="module" src="/src/main.ts"></script>
+  </body>
+</html>