chore(deps): update react monorepo to v19

Author: renovate[bot]

package.json

@@ -44,8 +44,8 @@
     "@types/react-dom": "^18.0.11",
     "@uiw/react-github-corners": "~1.5.3",
     "@uiw/react-markdown-preview": "~3.5.1",
-    "react": "^18.2.0",
-    "react-dom": "^18.2.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
     "kkt": "^7.4.9",
     "tsbb": "^4.1.4"
   },