[suggestion] add search and further sort functionality to the Work Order interface

[Totherphoenix]

The current sort function will send any non-repeatable work orders to the top of the list - this is amazing and exploitable to set up my priorities without excess clicking. However, once my work orders hit the 2-3 pages mark, we revert back into the territory of it being the worst UI in the game. Any chance DFHack could add a search function to this screen to allow us to search for existing work orders, as well as further sort functionality (by job, by alphabet, by material, etc.). Also, and finally, an error-check for duplicate work orders would be a great QoL addon - giving me an alert if I've added a work order that already exists in order to keep the work order list de-duped.