feat(BOOK-391): Added theme and logos for Bassin Seven

* chore: Updated border-radius variables after import change

Approved-by: Linus Flood

packages/design-system/lib/style.css

@@ -1,5 +1,6 @@
 @import url(./styles/impl.css);
 @import url(./styles/base.css);
+@import url(./styles/bassin-seven.css);
 @import url(./styles/downtown-camper.css);
 @import url(./styles/grand-hotel.css);
 @import url(./styles/haymarket.css);