feat: Implement promoter payout system for event revenue processing

- Add Payout model with associations to User and Event
- Create payout requests for completed events with proper earnings calculation
- Exclude refunded tickets from payout calculations
- Add promoter dashboard views for managing payouts
- Implement admin interface for processing payouts
- Integrate with Stripe for actual payment processing
- Add comprehensive tests for payout functionality

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

config/routes.rb

@@ -78,9 +78,7 @@ Rails.application.routes.draw do
 
   # === Promoter Routes ===
   namespace :promoter do
-    get "payouts/index"
-    get "payouts/show"
-    get "payouts/create"
+    resources :payouts, only: [:index, :show, :create]
     resources :events do
       member do
         patch :publish