✨(tokens) add JS generator and re-organize the repo

Added JsGenerator which to implied to reorganize a bit the
repo in order to extract generator-specific test into specific
standalone files.

packages/tokens/src/bin/Config.ts

@@ -1,8 +1,11 @@
 export default {
   configurationFilenames: ["cunningham.js", "cunningham.cjs"],
+  tokenFilenames: {
+    css: "cunningham-tokens.css",
+    js: "cunningham-tokens.js",
+  },
   sass: {
     varSeparator: "--",
     varPrefix: "c--",
-    tokenFilenameCss: "cunningham-tokens.css",
   },
 };