Introduce SUGGESTION_SELECTED event and fix multiple commit calls

[leewyatt]

This pull request addresses two primary concerns:

1. Introduction of SUGGESTION_SELECTED Event: (Add event which gets fired when the SearchField has commited #69 )

   • A new event type, SUGGESTION_SELECTED, has been added to the SearchEvent class.
   • This event is fired when a user selects a suggestion, providing more granular control over the suggestion selection process.
   • field.addEventHandler(SearchField.SearchEvent.SUGGESTION_SELECTED, event -> { System.out.println("A suggestion was selected! => " + event.getSelectedSuggestion()); });

2. Fix for Multiple Commit Calls: (SearchField - commit gets called 3 times when an item is selected #60 )

   • Identified and fixed an issue where the commit method was being invoked multiple times during a single suggestion selection.
   • Streamlined the process to ensure that the commit method is only called once per suggestion selection.