chore(demo): add @replexica/react to next demo

Author: maxprilutskiy

demo/next/.gitignore

@@ -35,4 +35,5 @@ yarn-error.log*
 *.tsbuildinfo
 next-env.d.ts
 
-.debug
+.debug
+output.txt

demo/next/package.json

@@ -15,6 +15,7 @@
   },
   "devDependencies": {
     "@replexica/compiler": "workspace:*",
+    "@replexica/react": "workspace:*",
     "typescript": "^5",
     "@types/node": "^20",
     "@types/react": "^18",