fix: add publishConfig to publish scoped package as public (#8)

- Add 'publishConfig.access: public' to package.json
- Scoped packages (@coffeecup_tech/*) are private by default on NPM
- This configuration allows publishing publicly without a paid plan
- Fixes '402 Payment Required' error during npm publish

Author: CoffeeCupTechWriting

package.json

@@ -63,6 +63,9 @@
     "ts-jest": "^29.4.6",
     "typescript": "^5.9.3"
   },
+  "publishConfig": {
+    "access": "public"
+  },
   "engines": {
     "node": ">=20.0"
   }