Add export for react-server in package.json of react-on-rails-pro

Author: AbanoubGhadban

packages/react-on-rails-pro/package.json

@@ -31,6 +31,7 @@
   "license": "UNLICENSED",
   "exports": {
     ".": {
+      "react-server": "./lib/ReactOnRailsRSC.js",
       "node": "./lib/ReactOnRails.node.js",
       "default": "./lib/ReactOnRails.full.js"
     },