chore: Improve website UI and add .vscode to .gitignore

- Update website footer to improve responsiveness and layout.
- Improve the styling and layout of the Home page components.
- Update the Layout component to handle mobile sidebar better.
- Improve Markdown rendering for better responsiveness.
- Remove unused NavBar component.
- Remove svelte-vscode extension from extensions.json.
- Add .vscode folder to .gitignore to prevent accidental commits.

sweb/tailwind.config.js

@@ -4,6 +4,14 @@ export default {
     './src/**/*.{html,js,svelte,ts}',
   ],
   theme: {
+    screens: {
+      'xs': '480px',
+      'sm': '640px',
+      'md': '768px',
+      'lg': '1024px',
+      'xl': '1280px',
+      '2xl': '1536px',
+    },
     extend: {
       colors: {
         blue: {