style: update card width variable to 33% across styles

the card width variable (--card-w) has been updated from 30% to 33% in multiple style files. this change affects the following files:
- libs/react/fpkit/src/components/cards/card.scss
- libs/react/fpkit/src/styles/cards/card.css
- libs/react/fpkit/src/styles/index.css

this update ensures consistency in card width styling across the application.

libs/react/fpkit/src/components/cards/card.scss

@@ -12,7 +12,7 @@
   --card-display: flex;
   --card-direction: column;
   --card-gap: 2rem;
-  --card-w: 30%;
+  --card-w: 33%;
 
   display: var(--card-display);
   flex-direction: var(--card-direction);