fix(deps): update react monorepo to v19

Author: renovate[bot]

package.json

@@ -21,8 +21,8 @@
     "next": "^14.2.4",
     "nextra": "^3.0.0",
     "nextra-theme-docs": "^3.0.0",
-    "react": "^18.3.1",
-    "react-dom": "^18.3.1",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
     "react-icons": "^5.2.1",
     "shiki": "^1.10.1",
     "@shikijs/transformers": "^1.10.1"