refactor: update city ordering

Order cities by name instead of filtering active cities. This change simplifies the CitiesController and improves code readability.

- Update City.includes method in CitiesController
- Remove active filter in City.includes method

app/controllers/cities_controller.rb

@@ -1,7 +1,7 @@
 class CitiesController < ApplicationController
   def index
     @regions = Region.includes(:countries).order(:name)
-    @cities = City.includes(:country, country: :region).active.order(:name)
+    @cities = City.includes(:country, country: :region).order(:name)
 
     if params[:region]
       @current_region = Region.friendly.find(params[:region])