fix(deps): update react monorepo to v19

Author: renovate[bot]

package.json

@@ -25,8 +25,8 @@
     "docusaurus-plugin-sass": "0.2.5",
     "kladenets": "2.0.0-15",
     "prism-react-renderer": "2.3.1",
-    "react": "18.2.0",
-    "react-dom": "18.2.0",
+    "react": "19.0.0",
+    "react-dom": "19.0.0",
     "rehype-katex": "^7.0.1",
     "remark-math": "^6.0.0",
     "sass": "1.77.2"