* Add /search/classified_listings route
* Add classified_listings search controller action
* Add spec for /search/classified_listings request
* Begin implementing frontend code
* Add debounce to classified_listings search
* before_action to format page & per_page as Integer
* Use new fetchSearch helper to fix codeclimate
* Refactor to reduce listingSearch function length
* Refactor into separate updateListings function
* Move updateListings function outside class
* Move page size to constant
* Add brackets to conditionals
* Add comment for tags param
* Add JS doc
* Move params logic/cleanup to search_controller
* Move listingIDs to const
* Rename remove_blank_params & move to before_action
* Add Transport module to Search
* Test public methods only
* Add Search::Client with exception handling
* Remove Transport and request do
* Replace SearchClient with Search::Client
