feat: Replace hero SVG with animated banner-3.gif

- Copied banner-3.gif to assets directories
- Updated hero section to use GIF instead of SVG
- Maintains all animations and styling

src/presentation/web/pages/landing/index.py

@@ -356,10 +356,10 @@ def hero() -> rx.Component:
                         filter="blur(50px)",
                         style={"animation": "pulse 4s ease-in-out infinite"},
                     ),
-                    # Main illustration - BluisHost style isometric servers
+                    # Main illustration - Server infrastructure GIF
                     rx.box(
                         rx.image(
-                            src="/hero-servers.svg",
+                            src="/banner-3.gif",
                             width="600px",
                             height="auto",
                             filter="drop-shadow(0 20px 60px rgba(27, 75, 127, 0.4))",