♻️(tokens) expose default tokens in a lib and various config

This allow to use the default tokens from Typescript or Javascript file
of dependents repos. For instance this wîll be used by packages/react
to aggregate components tokens files.

packages/tokens/src/lib/index.ts

@@ -0,0 +1,4 @@
+import { tokens } from "./cunningham-tokens";
+
+export type DefaultTokens = typeof tokens;
+export const defaultTokens = tokens;