feat(doc-item): add hover animation to DocItem card

- Added default styling with hover transition
- Preserves user-defined `sx` if passed

src/client/dd-hub-react/src/sections/document/doc-item.tsx

@@ -151,6 +151,15 @@ export function DocItem({
         />
     );
 
+    sx ??= {
+        cursor: 'pointer',
+        transition: 'transform 0.3s ease, box-shadow 0.3s ease',
+        '&:hover': {
+            transform: 'scale(1.03)',
+            boxShadow: 6,
+        }
+    }
+
     return (
         <Card sx={sx} {...other}>
             <Box