Add setup-node step for npm registry auth

setup-node with registry-url configures the .npmrc with the OIDC
token needed for trusted publishing via bunx npm publish.

Co-authored-by: Ona <no-reply@ona.com>

package.json

@@ -6,10 +6,6 @@
     "access": "public"
   },
   "description": "JSX factory for json-render. Write JSX, get Spec JSON.",
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/kennethnym/jrx"
-  },
   "type": "module",
   "module": "./dist/index.js",
   "types": "./dist/index.d.ts",