chore(packages): use temporary scope name

packages/core/README.md

@@ -1,10 +1,10 @@
-# @react-flow/core
+# @rctflw/core
 
 Core components and util functions of React Flow.
 
 ## Installation 
 
 ```sh 
-npm install @react-flow/core
+npm install @rctflw/core
 ```
 

packages/core/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@react-flow/core",
+  "name": "@rctflw/core",
   "version": "11.0.0-next.0",
   "description": "Core components and util functions of React Flow.",
   "keywords": [
@@ -13,9 +13,9 @@
   "files": [
     "dist"
   ],
-  "main": "dist/react-flow-core.cjs.js",
-  "module": "dist/react-flow-core.esm.js",
-  "types": "dist/react-flow-core.cjs.d.ts",
+  "main": "dist/rctflw-core.cjs.js",
+  "module": "dist/rctflw-core.esm.js",
+  "types": "dist/rctflw-core.cjs.d.ts",
   "sideEffects": false,
   "license": "MIT",
   "repository": {