fix: add repository URL for npm provenance publishing (#33)

- Add repository field to package.json (required for provenance)
- Add npm environment to release workflow

Author: nicknisi

.github/workflows/release.yml

@@ -10,6 +10,7 @@ jobs:
   publish:
     name: Publish to npm
     runs-on: ubuntu-latest
+    environment: npm
     permissions:
       contents: read
       id-token: write

package.json

@@ -3,6 +3,10 @@
   "version": "0.3.1",
   "type": "module",
   "description": "The Official Workos CLI",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/workos/cli"
+  },
   "keywords": [
     "workos",
     "authkit",