feat: Add Tailwind CSS and UI components

- Updated project to use Tailwind CSS for styling.
- Added new UI components including Navbar, Sidebar, Footer,
  Accordion, and Button.
- Created markdown content page for documentation.
- Improved overall structure and design of the application.

sweb/tailwind.config.js

@@ -4,7 +4,26 @@ export default {
     './src/**/*.{html,js,svelte,ts}',
   ],
   theme: {
-    extend: {},
+    extend: {
+      colors: {
+        blue: {
+          600: '#2563eb',
+          700: '#1d4ed8',
+        },
+        gray: {
+          50: '#f9fafb',
+          100: '#f3f4f6',
+          200: '#e5e7eb',
+          300: '#d1d5db',
+          400: '#9ca3af',
+          500: '#6b7280',
+          600: '#4b5563',
+          700: '#374151',
+          800: '#1f2937',
+          900: '#111827',
+        },
+      },
+    },
   },
   plugins: [],
 }