Add quant_purger drush commands

Here are the purge drush commands. The most relevant to this issue is:p:queue-empty (pqe)

p:                                                                                                                                                                
  p:debug-dis (pddis)                                              Disable debugging for all of Purge's log channels.                                             
  p:debug-en (pden)                                                Enable debugging for all of Purge's log channels.                                              
  p:diagnostics (pdia)                                             Generate a diagnostic self-service report.                                                     
  p:invalidate (pinv)                                              Directly invalidate an item without going through the queue.                                   
  p:processor-add (pradd)                                          Add a new processor.                                                                           
  p:processor-ls (prls)                                            List all enabled processors.                                                                   
  p:processor-lsa (prlsa)                                          List available processor plugin IDs that can be added.                                         
  p:processor-rm (prrm)                                            Remove a processor.                                                                            
  p:purger-add (ppadd)                                             Create a new purger instance.                                                                  
  p:purger-ls (ppls)                                               List all configured purgers in order of execution.                                             
  p:purger-lsa (pplsa)                                             List available plugin IDs for which purgers can be added.                                      
  p:purger-mvd (ppmvd)                                             Move the given purger DOWN in the execution order.                                             
  p:purger-mvu (ppmvu)                                             Move the given purger UP in the execution order.                                               
  p:purger-rm (pprm)                                               Remove a purger instance.                                                                      
  p:queue-add (pqa)                                                Add one or more items to the queue for later processing.                                       
  p:queue-browse (pqb)                                             Inspect what is in the queue by paging through it.                                             
  p:queue-empty (pqe)                                              Empty the entire queue.                                                                        
  p:queue-stats (pqs)                                              Retrieve the queue statistics.                                                                 
  p:queue-volume (pqv)                                             Count how many items are currently in the queue.                                               
  p:queue-work (pqw)                                               Process one or more chunks of items from the queue.                                            
  p:queuer-add (puadd)                                             Add a new queuer.                                                                              
  p:queuer-ls (puls)                                               List all enabled queuers.                                                                      
  p:queuer-lsa (pulsa)                                             List available queuer plugin IDs that can be added.                                            
  p:queuer-rm (purm)                                               Remove a queuer.                                                                               
  p:types (ptyp)                                                   List all supported cache invalidation types.                                                   

Fix typo.

See parent issue for some potential drush commands:

https://www.drupal.org/project/quantcdn/issues/3378059#comment-15407698 📌 META: Improve quant_purger UX Active

Bumping to normal as this makes things harder for people.