feat: add tile border radius (#2338)

* feat: add tile border radius

* fix: inconsistent mantine-core version

* fix: lockfile

---------

Co-authored-by: Meier Lukas <meierschlumpf@gmail.com>

packages/api/src/router/board.ts

@@ -517,6 +517,7 @@ export const boardRouter = createTRPCRouter({
 
           // layout settings
           columnCount: input.columnCount,
+          itemRadius: input.itemRadius,
 
           // Behavior settings
           disableStatus: input.disableStatus,