feat(factories): add default affiliateName and affiliateAvatarUrl

Add affiliateName and affiliateAvatarUrl properties to the
affiliate-link factory in Mirage to provide default values for
affiliate testing. This improves consistency in test data and
simplifies test setup for components relying on affiliate details.

Author: rohitpaulk

mirage/factories/affiliate-link.js

@@ -1,5 +1,7 @@
 import { Factory } from 'miragejs';
 
 export default Factory.extend({
+  affiliateName: () => 'test',
+  affiliateAvatarUrl: () => 'https://avatars.githubusercontent.com/u/1234567890?v=4',
   url: () => `https://app.codecrafters.io/join?via=test`,
 });