fix(deps): update react monorepo to v19

Author: renovate[bot]

package.json

@@ -29,8 +29,8 @@
     "next-mdx-remote": "^5.0.0",
     "next-remote-watch": "2.0.0",
     "prismjs": "^1.29.0",
-    "react": "^18.2.0",
-    "react-dom": "^18.2.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
     "remark-gfm": "^4.0.0"
   },
   "devDependencies": {