feat(icons): extract shared workspace icon package

Create @workspace/icons as the single Hugeicons-backed Icon primitive and icon-data export surface, with size presets and inherited current color.

Migrate blocks and the web app to the shared package, remove duplicated direct Hugeicons dependencies and the blocks-local Icon component, and update the lockfile.

packages/blocks/package.json

@@ -11,11 +11,10 @@
     "@base-ui/react": "^1.6.0",
     "@base-ui/utils": "^0.3.1",
     "@floating-ui/utils": "^0.2.12",
-    "@hugeicons/core-free-icons": "^4.2.3",
-    "@hugeicons/react": "^1.1.9",
     "@tanstack/react-hotkeys": "^0.10.0",
     "@tanstack/react-query": "^5.101.4",
     "@tanstack/react-router": "^1.170.18",
+    "@workspace/icons": "workspace:*",
     "@workspace/i18n": "workspace:*",
     "@workspace/ui": "workspace:*",
     "cmdk": "^1.1.1",