Currently if you want to build sass files, you can't just use the
webapp task preset, and multiple manual config modifications are required (build, webpack, jest). We should provide an easier way to handle that.
There are two types of scenarios we may want to support for building/bundling sass files:
@microsoft/loader-load-themed-styles). Might still need separate handling for jest.
We're probably more interested in doing (1) in a reusable manner, since most people are moving away from AMD.