Addresses a blocking issue for FAR of types when used in user-code in a
directive. The FAR infrastructure is skipping over the directive code
because it's mapped to `#hidden`. As you can see in the code, the token
provided by the user is already included in the projection mappings.
I think we didn't do this before because we didn't expect this code to
need line numbers - it's not really debuggable, and design-time codegen
doesn't happen when you build the project.
I think it's OK for now that we don't line-map (or include) directives
based on view imports. If you trigger FAR on an `@inject ...` in an
import for instance, you'll find the reference for the view import file.
That seems pretty good, and the only cases I can really imagine it being
broken would be for go-to-definition (within a Razor view). Lets revisit
in the future based on feedback.
