feat: Implement website structure

- Add navigation with Themes, Puzzles, and Miscellany.
- Create "coming soon" pages for Puzzles and Miscellany.
- Create a Themes page with cards for various topics.
- Implement basic boxy layout.
- Prepare for future interactive additions and filtering.
- Set up for Netlify deployment.

src/pages/theme-pages/AdvancedAlgorithms.tsx

@@ -0,0 +1,12 @@
+import ComingSoon from "@/components/ComingSoon";
+
+const AdvancedAlgorithms = () => {
+  return (
+    <ComingSoon 
+      title="Advanced Algorithms"
+      description="Deep dive into complex algorithmic concepts with step-by-step visualizations and performance analysis. Covering dynamic programming, graph algorithms, network flows, and optimization techniques."
+    />
+  );
+};
+
+export default AdvancedAlgorithms;