Variation Normalizer integration

[jsstevenson]

@korikuzma has drawn up our team's initial thoughts on how to bring our variation normalization service into the AnyVar fold (and I helped pick the fonts):

https://lucid.app/lucidchart/0fa1c9ae-1b61-4258-a94e-4cb1bb889655/edit?viewport_loc=-83%2C104%2C1166%2C1294%2C0_0&invitationId=inv_55e203e1-dd8f-475f-afd6-b44cea93bc45 (this link should be view-only, message either of us on slack if you'd like an editable link).

Feedback appreciated!