add code to job/ app to handle NewBoiler

[NLaws]

[rathod-b]

Hi Nick, I have added Boiler and ExistingBoiler as inputs and outputs to the model and I think the changes should work. When I send a request with Boiler and ExistingBoiler specified they show up as inputs in the GET response post optimization. However, I see there is no SpaceHeatingLoad inputs specified in models.py, so I cant really test it from Postman. Should i go ahead and add SpaceHeatingLoadInputs as well?

┌ Warning: Not creating Boiler because there is no heating load.
└ @ REopt C:\Users\BRATHOD\.julia\dev\REopt\src\core\scenario.jl:271