Build PCF directly from the maker portal

[OmarZaarour]

As a first step, it would be great if we can initiate the PCF project from the maker portal (specifying inputs/outputs and all other config) and then the ability to download the project. 

As a second step, I don't see why not we can't fully develop the PCF all form the maker portal without the need to leave the platform. Similar to web resources, if we can do it all from the maker portal, that will make it much easier!