Implement ticket selection with Stimulus controller and improve code documentation

- Add ticket selection functionality to event show page using Stimulus
- Create ticket_selection_controller.js for handling ticket quantity changes
- Update ticket card component and event show view to work with Stimulus
- Add comprehensive comments to all JavaScript files for better maintainability
- Remove dependent: :destroy from event ticket_types association

app/javascript/application.js

@@ -1,3 +1,8 @@
 // Entry point for the build script in your package.json
+// This file initializes the Rails application with Turbo and Stimulus controllers
+
+// Import Turbo Rails for SPA-like navigation
 import "@hotwired/turbo-rails";
+
+// Import all Stimulus controllers
 import "./controllers";