Added d.ts file to theme core (1/2)

components/lib/themes/actions/index.d.ts

@@ -0,0 +1,7 @@
+/* @todo - remove any types */
+export function definePreset(...arg: any[]): any;
+export function updatePreset(...arg: any[]): any;
+export function updatePrimaryPalette(palette?: any): any;
+export function updateSurfacePalette(palette?: any): string;
+export function usePreset(...arg: any[]): any;
+export function useTheme(theme: any): any;