Add complete author information with homepage and role

- Name: Taber
- Email: taber@shopkeeper.dev
- Homepage: https://shopkeeper.dev
- Role: Developer

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

composer.json

@@ -10,7 +10,9 @@
     "authors": [
         {
             "name": "Taber",
-            "email": "taber@shopkeeper.dev"
+            "email": "taber@shopkeeper.dev",
+            "homepage": "https://shopkeeper.dev",
+            "role": "Developer"
         }
     ],
     "require": {