chore: add design tokens to monorepo

.github/workflows/chromatic.yml

@@ -18,6 +18,7 @@ jobs:
         with:
           node-version-file: package.json
       - run: npm install
+      - run: npm --workspace="packages/calcite-design-tokens" run build
       - name: Publish to Chromatic
         uses: chromaui/action@v1
         with:

.release-please-manifest.json

@@ -1,5 +1,6 @@
 {
   "packages/calcite-components": "1.9.1",
   "packages/calcite-components-react": "1.9.1",
+  "packages/calcite-design-tokens": "1.0.0",
   "packages/eslint-plugin-calcite-components": "0.2.2"
 }