Feature: Searching The Result List

This PR introduce a functionality to search the result list: - Clicking "/" will show a search input at the bottom of the list, and <esc> to return to the result list - This will not mutate the original list; it should merely allow the user to search files and do actions on individual files - There should be an option to reset the filtered list - if the global process replace is actioned, there should be a modal confirming the action, to not replace all the files.