feat: Implement Calendar component, UiProvider, and a cn utility, while enhancing picker components with new icons and styles.

packages/ui/package.json

@@ -12,6 +12,7 @@
     "test:watch": "vitest --watch"
   },
   "dependencies": {
+    "@ant-design/icons": "^6.1.0",
     "@rc-component/checkbox": "^1.0.1",
     "@rc-component/form": "^1.6.2",
     "@rc-component/input": "^1.1.2",
@@ -21,6 +22,8 @@
     "@rc-component/textarea": "^1.1.2",
     "@repo/utils": "workspace:*",
     "@tailwindcss/vite": "^4.1.18",
+    "antd": "^6.2.3",
+    "clsx": "^2.1.1",
     "dayjs": "^1.11.19",
     "react": "^19.2.3",
     "react-dom": "^19.2.3",