feat: Animated 404 image, some style improvements, more attributions

sass/_scanlines.scss

@@ -33,6 +33,9 @@ $scan-opacity: 0.75;
   } @else {
     animation: none;
   }
+  @media (prefers-reduced-motion) {
+    animation: none;
+  }
 }
 
 // apply CRT animation: @include scan-crt($scan-crt);
@@ -42,6 +45,9 @@ $scan-opacity: 0.75;
   } @else {
     animation: none;
   }
+    @media (prefers-reduced-motion) {
+    animation: none;
+  }
 }
 
 // CSS .scanlines CLASS