chore: adding example template for transformation

Author: Stephanie Zeng

packages/foundations/package.json

@@ -8,7 +8,9 @@
     "./styles": "./index.css"
   },
   "scripts": {
-    "build": "radius-toolkit generate tokens.json -o styles/index.css"
+    "build": "radius-toolkit generate tokens.json -o styles/index.css",
+    "build:custom": "radius-toolkit generate tokens.json -c myCustomTemplate -T ./templates -o styles/vector.json",
+    "build:tailwind": "radius-toolkit generate tokens.json -t tailwind"
   },
   "keywords": [],
   "author": "",

packages/foundations/templates/myCustomTemplate.ts

@@ -0,0 +1,15 @@
+import type { TemplateModule } from "radius-toolkit";
+
+export default {
+  name: "my-custom-template",
+  render: ({ layers, vectors }, options) => {
+    const transformed = vectors?.map(({ name, properties, source }) => {
+      return {
+        name,
+        properties: JSON.stringify(properties),
+        source,
+      };
+    });
+    return Buffer.from(`${JSON.stringify(transformed)}`);
+  },
+} satisfies TemplateModule;