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/lib/utils.js

@@ -1,6 +1,9 @@
 import { clsx } from "clsx"
 import { twMerge } from "tailwind-merge"
 
+// Utility function for conditionally joining CSS classes
+// Combines clsx (for conditional classes) with twMerge (for Tailwind CSS conflicts)
+// Usage: cn("class1", "class2", conditionalClass && "class3")
 export function cn(...inputs) {
   return twMerge(clsx(inputs))
 }