Better error message for missing methods

[excid3]

I tried using Hotwire Combobox this morning and hadn't implemented the to_combobox_display method in my model. I got an error and it took me a minute to understand what I needed to do. It would be nice to have a better exception raised here.

This method may need a refactoring to provide different error messages for each usage:

hotwire_combobox/lib/hotwire_combobox/helper.rb

Lines 121 to 127 in d171cb9

	def hw_call_method_or_proc(object, method_or_proc)
	if method_or_proc.is_a? Proc
	method_or_proc.call object
	else
	object.public_send method_or_proc
	end
	end

It would be really helpful to new users to provide some thorough error messages in these cases, for example with the above missing method:

      def hw_call_method_or_proc(object, method_or_proc)
        if method_or_proc.is_a? Proc
          method_or_proc.call object
        else
          object.public_send method_or_proc
        end
      rescue NoMethodError => error
        raise error.exception(<<~MESSAGE
          The #{object.class} class does not respond to `#{method_or_proc}`. This method is used to provide a display value in the Hotwire Combobox. Add this method to your model and return a string for displaying in the options list:
          
              def #{method_or_proc}
                name
              end
        MESSAGE
      end

[josefarias]

This is a great callout. Thanks!

Tentative fix here: #63 would love your eyes on it if you have a sec.

[josefarias]

PR merged! Happy to refine further, too.