fix(types): Fix the appearance.baseTheme type to accept array of BaseTheme (#2887)

Author: anagstef

.changeset/curvy-kids-sip.md

@@ -0,0 +1,5 @@
+---
+'@clerk/types': patch
+---
+
+Fix the appearance.baseTheme type to accept array of BaseTheme

packages/types/src/appearance.ts

@@ -519,7 +519,7 @@ export type Theme = {
    * import { dark } from "@clerk/themes";
    * appearance={{ baseTheme: dark }}
    */
-  baseTheme?: BaseTheme;
+  baseTheme?: BaseTheme | BaseTheme[];
   /**
    * Configuration options that affect the layout of the components, allowing
    * customizations that hard to implement with just CSS.