Allow creating budgets step by step

We introduce the first step (creating the budget).

Co-Authored-By: decabeza <alberto@decabeza.es>

config/routes/admin.rb

@@ -51,7 +51,7 @@ namespace :admin do
     end
   end
 
-  resources :budgets do
+  resources :budgets, except: [:create, :new] do
     member do
       patch :publish
       put :calculate_winners
@@ -72,6 +72,10 @@ namespace :admin do
     resources :budget_phases, only: [:edit, :update]
   end
 
+  namespace :budgets_wizard do
+    resources :budgets, only: [:create, :new]
+  end
+
   resources :milestone_statuses, only: [:index, :new, :create, :update, :edit, :destroy]
 
   resources :signature_sheets, only: [:index, :new, :create, :show]