fix: port to core 5

packages/website/src/core/radix/var.ts

@@ -0,0 +1,9 @@
+type Name =
+  | `color-${'background' | `panel-${'solid' | 'translucent'}` | 'surface' | 'overlay'}`
+  | `radius-${1 | 2 | 3 | 4 | 5 | 6 | 'full'}`
+  | `space-${1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9}`
+  | string;
+
+export function Var(name: Name) {
+  return `var(--${name})`;
+}