fix: react-core subpaths for next/deprecated modules

Author: jpuzz0

packages/react-core/package.json

@@ -5,6 +5,13 @@
   "main": "dist/js/index.js",
   "module": "dist/esm/index.js",
   "types": "dist/esm/index.d.ts",
+  "exports": {
+    ".": "./dist/esm/index.js",
+    "./dist/*": "./dist/*",
+    "./next": "./dist/esm/next",
+    "./deprecated": "./dist/esm/deprecated",
+    "./package.json": "./package.json"
+  },
   "typesVersions": {
     "*": {
       "next": [