refactor: update favicon and adjust Footer tagline and NoSinglePoint animation dimensions

- Replaced favicon.ico with new version
- Changed Footer tagline from "Unleash the Power of Decentralization" to "Built for Digital Sovereignty"
- Adjusted NoSinglePoint animation dimensions from 720x540 to 720x420 for better alignment with other home animations
- Updated dimension comments to reflect aspect ratio and visual height alignment goals

src/pages/home/animations/NoSinglePoint.tsx

@@ -10,8 +10,8 @@ type Props = {
   gridStroke?: string;
 };
 
-const W = 720; // 4:3
-const H = 540; // 4:3
+const W = 720; // match aspect ratio closer to other home animations
+const H = 420; // align visual height with other cards
 
 export default function NoSinglePoint({
   className,