feat(ui-icons): migrate icon compiler to distinct package

Author: castastrophe

.storybook/package.json

@@ -7,9 +7,9 @@
   "homepage": "https://opensource.adobe.com/spectrum-css/preview",
   "main": "main.js",
   "dependencies": {
+    "@adobe/spectrum-css-ui-icons": "^0.0.0-alpha.0",
     "@adobe/spectrum-css-workflow-icons": "^1.5.4",
     "@spectrum-css/expressvars": "^3.0.9",
-    "@spectrum-css/icon": "^4.0.5",
     "@spectrum-css/site": "^4.0.2",
     "@spectrum-css/tokens": "^13.0.5",
     "@spectrum-css/vars": "^9.0.8"